The carbon cycle cannot be observed in its entirety because it is a global process, so it is helpful to understand the process of carbon circulation in the ecosystem.
What is the carbon cycle model?Students and scientists can better grasp how carbon flows through the ecosystem and affects it by using models.
The carbon cycle explains how carbon moves between several Earth-based reservoirs. This cycle is crucial for preserving the Earth's carbon balance and stable temperature.
Therefore, the use of the carbon cycle model describes better knowledge about the phenomenon.
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Play Soccer, Eat Well achieve300 answers
Answer:
well I do
Explanation:
so Yass
Two key components of leading a healthy lifestyle are participating in football and eating well. A fantastic method to keep in shape and receive physical activity is to play football.
What are the various activities that will help in the fitness ?Running, jumping, and kicking frequently while playing this sport can assist to build stronger muscles and enhance cardiovascular health. It can also aid in improving your coordination and agility. A healthy lifestyle can only be achieved with proper nutrition.
Your body can acquire the nutrients it needs to stay healthy by eating a balanced diet with lots of fruits, vegetables, and lean proteins. Additionally, it can aid in lowering your chance of developing chronic illnesses like diabetes and heart disease.
Maintaining a healthy diet can also assist with reducing your weight can improve your health in general. Therefore, maintaining a healthy lifestyle requires both eating healthily and playing football.
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I need help with this question
The bones appear similar in structure while being different mammals because mammals lived in a similar environments.
What Is An Environment?Everything in our immediate surroundings, including both living and nonliving entities like soil, water, animals, and plants that adapt to their environment, is referred to as the environment. Nature's bounty contributes to supporting life on Earth.
The existence of life on Earth is significantly influenced by the environment. The French term "Environ," which means "surrounding," is where the word "environment" originates. An ecosystem is defined as all living and non-living objects found in an area. It is the basis of the biosphere, which governs the wellbeing of the entire planet.
The study of organisms and how they interact with one another and with their environment is the main focus of the life science fields of ecology and environmental science.
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what is....
______ unicellular, prokaryotic, bacteria, blue-green algae, spirochetes
______ unicellular, prokaryotic, halophiles, thermophiles
______ unicellular/multicellular, eukaryotic, dinoflagellates, golden, brown and yellow-green algae, diatoms, amoeba
______ multicellular, eukaryotic, all plants
______ unicellular/multicellular, eukaryotic, molds, yeasts, mushrooms
______ multicellular, eukaryotic, all animals
Word bank:
alumalae
bacteria
planetaria
protista
plantae
archaea
somalia
animalia
fungi
What is bacteria unicellular, prokaryotic, bacteria, blue-green algae, spirochetes archaea unicellular, prokaryotic, halophiles, thermophiles
protista unicellular/multicellular, eukaryotic, dinoflagellates, golden, brown and yellow-green algae, diatoms, amoeba plantae multicellular, eukaryotic, all plants fungi unicellular/multicellular, eukaryotic, molds, yeasts, mushrooms animalia multicellular, eukaryotic, all animals.
What is bacteria?This refers to a large group of single-cell microorganisms. They can cause infections and diseases in animals and humans.
What is protista?
This refers to simple eukaryotic organisms that are neither plants nor animals or fungi. Protists are unicellular (one cell) in nature but can also be found as a colony of cells. Most protists can be found in water, damp terrestrial environments, or even as parasites.
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Use the drop down menus to identify the terms described below __a group of cells that secretes substances into the blood or directly into an organism __a substance produced by cells that help specific groups of cells to perform specific functions
Gland is a group of cells that secretes substances into the blood or directly into an organism.
Hormone is a substance produced by cells that help specific groups of cells to perform specific functions.
What is Gland and Hormone?A gland is an organ in the body that secretes hormones, enzymes, and other substances for use in the body or for discharge into the surroundingsA body part that produces one or more substances, such as saliva, perspiration, tears, hormones, digestive juices, or milk.The compounds are released by endocrine glands straight into the circulation. Exocrine glands discharge the materials into a duct or aperture that leads to the inside or exterior of the body.A hormone is a chemical messenger that is produced by an endocrine gland and released into the bloodstream. Hormones control and regulate many of the body's processes, including growth, metabolism, and sexual development. The chemical messengers of your body are hormones. To tissues or organs, they go through your bloodstream.Growth and development are just two of the many processes they have an impact on as they operate gradually throughout time. Using the food you eat as fuel, your body uses a process called metabolism.To learn more about Gland from the given link
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Find out how your local authority manages the solid waste generated in your neighborhood.
a) Are these measures adequate?
b) If not, what improvements would you suggest?
c) What could your family do to reduce the amount of solid waste generated during a day?
Answer:
No the measures taken by my local authority is not adequate. I would like to suggest an improvement of using new cleaning trucks and making better sewage cannal system throughout my town.
As a family we can produce less solid wastage and keep the recyclable and non recyclable wastes separately for safe decomposition.
when a man has an allele combination ww for a trait, what percentage of his gametes will have a dominant allele for that trait?
Answer:
0%
Explanation:
The man is homozygous recessive for his trait. ( Since you have used small letters for the genotype I am assuming it to be recessive) . At the time of gamete formation each gamete will get one of the two alleles according to Mendel's law of Segregation as w and w . So both the gametes will receive recessive allele.Hope this helps!
in terrestrial ecosystems, most energy flow passes through detritus. group of answer choices true false
True, in terrestrial ecosystems, most energy flow passes through detritus as it serves as a primary source of food for decomposers such as bacteria, fungi, and invertebrates which in turn releases nutrients and energy that can be used by other organisms in the ecosystem
Detritus is the dead organic matter such as fallen leaves, twigs, and dead animals that accumulates on the forest floor. It is broken down by decomposers, such as bacteria and fungi, into simpler compounds that can be used by plants as a source of energy and nutrients. This broken-down detritus is then consumed by herbivores, which are in turn consumed by carnivores. This process is called the detritus food web, and it is the primary way that energy and nutrients are cycled through terrestrial ecosystems.
It's worth noting that detritus is not the only energy source in terrestrial ecosystems. Photosynthesis is also a source of energy. However, the energy that flows through detritus is an important part of the ecosystem's energy budget.
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What type of epithelial tissue, found in the intestines, absorbs nutrients?
-stratified cuboidal epithelium
-simple cuboidal cells
-simple columnar epithelium
-stratified columnar epithelium
-stratified squamous epithelium
Stratified columnar epithelium is epithelial tissue, found in the intestines, absorbs nutrients .
In general ,Simple columnar epithelium is the epithelium that is often specialized for absorption and it consists of apical cilia or microvilli. these epithelial cells also line your stomach and intestines. hence , lining of the stomach and intestines in the gastrointestinal tract are formed of simple columnar epithelial cells.
In intestines , Absorptive cells are most predominant epithelial cell present in the lining of lumen in the small intestine and colon. They mostly works in absorption of nutrients across the layers of plasma membrane and also export same nutrients across the basal plasma membrane.
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Stratified columnar epithelium is epithelial tissue, found in the intestines, absorbs nutrients .
Simple columnar epithelium is the epithelium that is often specialized for absorption and it consists of cilia or microvilli. These epithelial cells also line your stomach and intestines. Hence , lining of the stomach and intestines in the gastrointestinal tract are formed of simple columnar epithelial cells.
In intestines , Absorptive cells are the most predominant epithelial cell present in the lining of lumen in the small intestine and colon. They mostly work in absorption of nutrients across the layers of plasma membrane and also export the same nutrients across the basal plasma membrane.
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When organisms struggle to survive they usually mutate to increase chances of reproduction
Phenotypes are essentially the physical characteristics that an organism possesses that make it more likely than not that it would thrive in a given environment.
What are the statements are true?The following assertions are accurate:
1. Survival is a race that all species must win.
3. Some species possess traits that enable them to outcompete rivals in their environment.
5. Natural selection is still in action today.
6. Over the course of multiple generations, phenotypes that are present in a species' most successful individuals grow more common.
It should be remembered that creatures compete with one another for existence in the natural world. Some people have superior phenotypes to others.Phenotypes are essentially the physical characteristics that an organism possesses that make it more likely than not that it would thrive in a given environment.The complete question is Check all statements below that are true. All organisms must compete for survival. When organisms struggle to survive, they usually mutate to increase chances of reproduction. Some organisms have phenotypes that make them better competitors than others in their environment. Animals undergo natural selection, but plants and other organisms generally do not. Natural selection continues to occur even today. Phenotypes found in the most successful members of a species become the most prevalent after several generations. A decrease in food availability will increase the variation in a population.
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How have arctic tundra herbivores adapted to their ecosystem? (Select all that apply. ) MULTIPLE CHOICE QUESTION
They can change their internal temperatures when needed.
They can survive on short plants, mosses, and lichens.
They have extra fur to protect against the cold.
They migrate to the south during the cold months
Arctic tundra herbivores are adapted to their ecosystem because c. They have extra fur to protect against the cold and b. They can survive on short plants, mosses, and lichens.
What are the adaptations in Arctic tundra herbivores?Adaptations in tundra herbivores include thick fur coats to protect them from the cold temperatures, large hooves to provide traction on the icy ground, and a diet that consists of low-energy food such as grasses, mosses, and lichens or the ability to store fat.
Therefore, with this data, we can see that adaptations in Arctic tundra herbivores are based on fur.
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which characteristic of living things can be seen in both viruses and bacteria? responses reproduction reproduction cellular organization cellular organization homeostasis homeostasis
Reproduction characteristic of living things can be seen in both viruses and bacteria
virus and bacteria show many more similarities like, they both are microscopic and are pathogens, some bacteria are also pathogenic and may cause diseases like virus. The virus depends on bacteria for replication machinery.
Bacteria and virus reproduces by division of parent cells into many offspring's.
both virus and bacteria consist of nucleic acid and they both contain enzymes.
both virus and bacteria have immunity against some viruses and bacteria, and there are vaccines for diseases caused by both of them.
some of viruses and bacteria are beneficial and are used in genetic engineering and bacteria is used in the food industry.
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While doing a pedigree analysis of a European royal family, you notice a disease in a female child of two healthy parents. There are also some cousins with the same genetic disease. If this disease is controlled by a single gene, then the most likely explanation for these observations is the disease is O only seen in heterozygous individuals such as the daughter. O recessive and only seen in homozygous recessive individuals such as the daughter. O dominant and is seen in homozygous dominant or heterozygous individuals. dominant and only seen in homozygous dominant individuals such as the daughter. O a spontaneous mutation.
The most likely explanation for these observations is that the disease is dominant and is seen in both homozygous dominant and heterozygous individuals.
This means that if both parents are carriers of the recessive gene, then the daughter has a 25% chance of having the disease. If one parent is a carrier and the other is not, then the daughter has a 50% chance of having the disease. If both parents are carriers, then the daughter has a 75% chance of having the disease.
This is also likely if cousins with the same disease can be found, since it is likely that their parents are related and thus both carriers of the same recessive gene.
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If this disease is controlled by a single gene, then the most likely explanation for these observations is the disease is (option B) recessive and only seen in homozygous recessive individuals such as the daughter.
If the disease you are observing in the European royal family is controlled by a single gene, and it appears in a female child of two healthy parents, it is most likely a recessive disease. In a recessive disorder, a person must inherit two copies of the mutated gene, one from each parent, in order to develop the disease.
If the parents are both healthy, they must be carriers of the gene, meaning they each have one copy of the mutated gene but do not have the disease themselves because they have a normal copy of the gene that masks the effect of the mutant gene. When two carriers have a child, there is a 25% chance that the child will inherit two copies of the mutated gene and develop the disease.
Also, the fact that there are cousins with the same genetic disease supports the idea that this is a recessive disorder. If the disorder were dominant, it would likely have appeared in the parents or previous generations.
It's important to note that this is just one possible explanation, a thorough genetic analysis must be done to confirm the mode of inheritance of the disease.
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formation of a tetraploid plant from two different diploid parent species of plants is an example of
Formation of a tetraploid plant from two different diploid parent species of plants is an example of allopolyploid.
Allopolyploidy is a form of polyploidy, which is the presence of multiple sets of chromosomes in a cell or organism. It occurs when two different species of plants hybridize and produce a new organism with multiple sets of chromosomes from both parent species. These organisms are referred to as allopolyploids and they can have advantages over their diploid parents, such as increased genetic diversity, increased stress tolerance, and increased fertility. This is because allopolyploids have a greater number of genes, which can allow for greater adaptability to different environmental conditions. Allopolyploids are also often fertile, which can enable them to establish new populations and potentially become new species. The formation of a tetraploid plant from two different diploid parent species is an example of allopolyploidy, as it results in a plant with four sets of chromosomes, two from each parent species.
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1. This term refers to the time it takes identical points on two waves to pass through the
same point.
a. Crest
b. Wavelength
c. Trough
d. Period
Answer: Period
Explanation:
This is the time it takes for two crests to pass a given point. Should be memorised + in geography not biology.
increasing levels of carbon dioxide in the oceans makes them acidic. this change affects the ability of marine organisms to form protective shells made up of carbonate. group of answer choices more; phosphorus more; calcium less; phosphorus less; calcium
CO2 fixations drive increasing temperatures and fermentation. The rising centralization of carbon dioxide in the environment is driving up sea surface temperatures and causing sea fermentation.
As a result of human-driven expanded degrees of carbon dioxide in the environment, there is more CO2 dissolving into the sea. The sea's typical pH is currently around 8.1, which is fundamental (or antacid), however as the sea keeps on engrossing more CO2, the pH diminishes and the sea turns out to be more acidic.
Numerous marine organic entities that produce calcium carbonate shells or skeletons are adversely affected by expanding CO2 levels and diminishing pH in seawater. For instance, expanding sea fermentation has been displayed to fundamentally diminish the capacity of reef-building corals to deliver their skeletons.
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Increasing levels of carbon dioxide in the oceans makes them acidic. this change affects the ability of marine organisms to form protective shells made up of carbonate (b). more calcium is correct option.
Human actions like the burning of fossil fuels, deforestation, and others are causing the atmospheric concentration of carbon dioxide to rise. Ocean acidification is a result of carbon dioxide emissions. It happens when a high rate of readily absorbed carbon dioxide into the water. Water and carbon dioxide combine to generate carbonic acid. Bicarbonate and a hydrogen ion (H+) are the products of carbonic acid breakdown (HCO3-). All of these hydrogen ions cause the pH of the water to fall, which results in acidity.
This process has a negative impact on marine species' quality of life because acidic water dissolves their calcium carbonate skeletons and shells.
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Avery's team repeated Griffith's experiments because they wanted to
A. determine which molecule in the heat-killed bacteria was the transforming factor.
B. determine which gene in the heat-killed bacteria was was the transforming factor.
C. determine which process in the heat-killed bacteria was the transforming factor.
D. determine which enzyme in the heat-killed bacteria was the transforming factor.
Avery's team repeated Griffith's experiments because they wanted to A. determine which molecule in the heat-killed bacteria was the transforming factor.
What is the transforming factor of the Avery experiment?The transforming factor of the Avery experiment was a substance called deoxyribonucleic acid (DNA). instead of proteins and thus Avery showed that DNA is the genetic material transmitted across generations in all life forms.
Therefore, with this data, we can see that the transforming factor of the Avery experiment was DNA instead of proteins, which is a fundamental discovery to show how biomolecules are generated.
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what is the net charge of a glycine molecule in human blood at ph 7.4, given an amino group of glycine has a pka
The net charge of a glycine molecule in the human blood at pH = 7.4 is equal to zero (0).
Glycine is one of the amino acids which are present in our body and consists of a single hydrogen (H) atom as its side chain. It is the simplest amino acid.
At a pH lesser then 2 both the oxygen and the nitrogen will be protonated, so the charge on glycine will be +1. Above the pH 9, both oxygen and nitrogen will be deprotonated to give a net charge of -1 .
At pH value between 3 and 9 the oxygen on the molecule will be deprotonated but the nitrogen will still be protonated to give it a neutral charge or we can say the net charge is 0. Therefore, at pH = 7.4 the net charge on glycine will be zero.
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The net charge of a glycine particle in the human blood at pH = 7.4 is equivalent to nothing (0).
Glycine is one of the amino acids which are available in our body and comprises a solitary hydrogen (H) particle as its side chain. It is the most straightforward amino corrosive.
At a pH lesser than 2 both the oxygen and the nitrogen will be protonated, so the charge on glycine will be +1. Over pH 9, the two oxygen and nitrogen will be deprotonated to give a net charge of - 1.
At pH esteem somewhere in the range of 3 and 9 the oxygen on the particle will be deprotonated however the nitrogen will, in any case, be protonated to give it a nonpartisan charge or we can say the net charge is 0. In this manner, at pH = 7.4, the net charge on glycine will be zero.
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a flower is yellow and has long, dark lines running from the tip of a petal to the base, near the pistil attachment. what type of pollination might this plant use?
If a particular flower is yellow in color and has a long, dark lines which running from the tip of a petal to the base, near the pistil attachment, then the preferred mode of pollination for this plant should be animal-based called zoophily.
Zoophily, which is also known as zoogamy, is basically a form of pollination in which the pollen is basically transferred by animals, by either invertebrates or vertebrates, which is in most cases birds and bats, but also by other animals.
Animals and insects get attracted to flowers which are bright in color, have patterns and contain nectar. The given plant has a yellow color with black lines running in the petals. The flower will be able to attract insects like bees and butterflies which will help it in pollination.
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Explain an environmental benefit a town
might experience if it switches from a coal
fired power plant to a wind farm as its
primary source of energy.
One major environmental benefit a town might experience if it switches from a coal-fired power plant to a wind farm as its primary source of energy is a reduction in air pollution. Coal-fired power plants are a major source of air pollution, emitting harmful pollutants such as sulfur dioxide, nitrogen oxides, and particulate matter. These pollutants can cause respiratory problems, heart disease, and other health issues, particularly for vulnerable populations such as children, the elderly, and people with pre-existing health conditions.
On the other hand, wind farms do not produce any air pollution. They are a clean and renewable source of energy that generates electricity without the need for fossil fuels. This means that by switching to a wind farm, the town would be able to reduce its air pollution and improve the health of its residents.
Additionally, wind energy does not emit any greenhouse gases, which contribute to global warming. It also does not require water for cooling, reducing the strain on water resources. It also does not generate waste and does not need to be transported or stored, reducing the risk of oil spills or other accidents.
In a cross between two individuals that are heterozygous for tongue rolling, what is the phenotypic ratio?
Answer:
The phenotypic ratio of a cross between two heterozygotes is 9:3:3:1
Explanation:
where 9/16 of the individuals possess the dominant phenotype for both traits, 3/16 of the individuals possess the dominant phenotype for one trait, 3/16 of the individuals possess the dominant phenotype for the other trait, and 1/16 are recessive for for both traits.
Early chordates are believed to have an early form of the
Select one:
a.pituitary gland.
b.thymus gland.
c.adrenal gland.
d.thyroid gland.
Answer:
it’s C. Adrenal
Explanation:
1. What substance was placed on the plant cells to the right that caused their change in appearance?
2. What substance could we rinse the cells with to return their appearance to their original state?
Polysaccharides was placed on the plant cells to the right that caused their change in appearance.
What do you mean by polysaccharides?Polysaccharides, or polycarbohydrates, are the most abundant carbohydrates found in food. They are long-chain polymeric carbohydrates composed of monosaccharide units bound together by glycosidic linkages.
Polysaccharides are major classes of biomolecules. They are long chains of carbohydrate molecules, composed of several smaller monosaccharides. These complex bio-macromolecules functions as an important source of energy in animal cell.
Polysaccharide is a natural macromolecule located in the primary cell walls of plants. It was built from hundreds to thousands of monosaccharide combination through dehydration synthesis.
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Populations evolve for many reasons. Suppose there is a population of plants that have either purple flowers or white flowers, and the allele for purple flowers is dominant. This means that plants with two purple alleles have purple flowers. Plants with one purple allele and one white allele also have purple flowers. Only plants with two white alleles have white flowers.For each event or condition described below, answer the following questions.
The term "evolution" refers to a change in the genetic makeup of a population over many generations. Natural selection, Genetic drift, and the Gene flow mechanism of evolution are at work.
Genetic drift is when a population's allele frequencies change from one generation to the next due to chance events or sampling errors in selecting alleles from the current generation's gene pool for the next generation. In small populations, genetic drift has a significant impact.
Gene flow refers to the movement of genes or genetic material within a population. Gene flow occurs when individual organisms or their reproductive cells move from one generation to the next. Evolution is strongly influenced by gene flow. Natural selection occurs when an allele or allele combination makes an organism to be the fittest of the population as it survives on the fittest product. The organism selected through natural selection can able to withstand stress and can reproduce in the environment to inherit the desirable traits to the next generation. The two populations will possess equal allele frequencies if the rate of gene flow is high. As a result, it is referred to as a single effective population.
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(complete question)
Populations evolve for many reasons. Suppose there is a population of plants that have either purple flowers or white flowers, and the allele for purple flowers is dominant. This means that plants with two purple alleles have purple flowers. Plants with one purple allele and one white allele also have purple flowers. Only plants with two white alleles have white flowers. For each event or condition described below, answer the following questions. Which mechanism of evolution is at work? • How does this event affect the population's gene pool? Do the frequencies of the two alleles change, and if so, how?
The term "evolution" describes a shift in a population's genetic make-up over many generations. The mechanisms of natural selection, genetic drift, and gene flow are in operation.
Genetic drift is the process through which the allele frequencies of a population shift from one generation to the next as a result of random occurrences or sampling errors while choosing alleles from the gene pool of the current generation for the following generation. Genetic drift has a large effect in tiny populations.
The movement of genes or other genetic components within a population is referred to as gene flow. When reproductive cells or individual organisms pass from one generation to the next, this is known as gene flow. Gene flow has a big effect on evolution. Natural selection happens when one allele, or an allele combination, makes an organism the fittest member of the community because it feeds on the products of the fittest individuals. Natural selection favours organisms that can reproduce in their environment and resist stress while passing on the desired features to offspring. If the rate of gene flow is high, the two populations will have the same distribution of allele frequencies. It is referred to as a single effective population as a result.
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organ system that captures oxygen from the atmosphere is
Respiratory system , the system through which living things absorb oxygen and expel carbon dioxide to meet their energy needs.
What Constitutes the Respiratory System's Components?
The lungs, voice box, windpipe, nose, mouth, and throat are all parts of the respiratory system.
Through the mouth or nose, air enters the respiratory system. The air gets warmed and humidified if it enters the nostrils (also known as the nares). The nasal passageways and other areas of the respiratory tract are shielded by tiny hairs known as cilia, which filter out dust and other particles that enter the nose through inhaled air.
Our bodies' cells require oxygen to remain alive. In our bodies, carbon dioxide is created while cells function.
The respiratory system, which includes the lungs, allows the body to breathe in oxygen from the surrounding air and expel carbon dioxide.
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In a redox reaction electron are donated and accepted by molecules or atoms
a. water is formed by all the extra protons coming together
b.an electron gradient is generated across the mitochondria inner membrane
c.proteins are precursors for electron carriers
d.electron carriers, NADH and FADN2, pick up electrons from the
In redox reaction electron are donated and accepted by molecules or atoms : d.) electron carriers, NADH and FADN2, pick up electrons from glycolysis and Krebs cycle.
What is redox reaction?Redox reactions is the summation of oxidation and reduction reactions. It provides cellular energy because flow of electrons between molecules produces usable energy. Metabolism is sum of chemical reactions that occurs within each cell to supply energy for important cellular processes.
Purpose of redox reactions in the cell is energy transfer and energy in metabolic reactions is usually stored in the form of electrons. Redox reactions involve electron transfer and electron transfers can be thought of as energy exchanges.
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An error in DNA where one base is added.
a medical job requires memorizing where important nerves and blood vessels are located. based on this requirement, who would be likely to excel at this job?
A medical job requires memorizing where important nerves and blood vessels are located, so based on this requirement, a women would be likely to excel at this job because they have better memory than men.
In middle age, women's memory is superior to men's, but it deteriorates more quickly. Women in their middle age have superior memories to men. They also have faster information processing than men. But in the years that follow, both cognitive abilities in women deteriorate more quickly. Because their emotional emotions are more intense than the normal male reaction, which aids in the memory trace's easier recording, they exhibit greater memory function.
The activity in a woman's brain was consistently more closely organised in her left hemisphere, whereas a man's was more firmly coordinated.
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A clinical occupation requires remembering where significant nerves and veins are found, so in light of this prerequisite, ladies would probably succeed at this special job since they have preferable memory over men.
In moderately aged, ladies' memory is better than men's, however, it disintegrates all the more rapidly. Ladies in their middle age have better recollections than men. They additionally have quicker data handling than men. In any case, in the years that follow, both mental capacities in ladies disintegrate all the more rapidly. Since their close-to-home feelings are more extraordinary than the ordinary male response, which helps with the memory follow's simpler recording, they display more noteworthy memory capability.
The movement in a lady's cerebrum was reliably more firmly coordinated in her left side of the equator, though a man was all the more immovably organized.
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Which statement(s) corresponds correctly to a mutation?
an additional gene (base pairs) added to DNA
information added to the genetic code
a copy error in the chromosomes
a mistake in the DNA "ladder"
Answer:
a copy error in the chromosomes
a mistake in the DNA "ladder"
Explanation:
If a trait is X-linked recessive, who would express the trait?
a) the same proportions for females and males
b) homozygous recessive females and hemizygous recessive males
c) homozygous dominant females and hemizygous recessive males
d) heterozygous dominant females and hemizygous dominant males
e) heterozygous recessive females and hemizygous dominant males
Answer:
Option A
Explanation:
X linked recessive traits are seen in females who have homologous recessive X chromosomes and in hemizygous males .Females have two X chromosomes , so in order to have show recessive phenotype both pair of alleles should be recessive. If only one recessive allele is present in female then it's effect would be masked by the dominant allele.In males there is only one X chromosome , so even if they have one recessive chromosome they will show the recessive phenotype. Some examples of X linked recessive traits are Hemophilia , colour blindness, etcother component of our blood type is the Rh factor. Some people have Rh positive blood and
others have Rh negative blood. The Rh factor is determined by one gene with two alleles. The allele
Home work allele and "y" to represent the r
for Rh positive is dominant over the allele for Rh negative. Let's use "R" to represent the positive
negative allele.
IR
|v
118
Ir
Work this problem: A woman whose blood type is AB negative marries a man with blood type O
positive. The man's mother had blood that was A negative.
What is the genotype of the woman?
10 |^ TV
What is the genotype of the man?
TIR
What is the genotype of the man's mother?
Alrr
What types of children might this man and woman expect to have?
1or 11°r
Genotypes
Phenotypes
The genotype of the woman with AB negative blood is IAi.
The genotype of the man with O positive blood is ii.
The genotype of the man's mother with A negative blood is IAi.
This man and woman could expect to have children with blood types A, B, AB, or O, but all of them would be Rh negative as the negative allele is recessive. The genotypes of their children could be IAi, IBi, IAi/IBi (AB), or ii (O) and the phenotypes would be A negative, B negative, AB negative and O negative respectively.
What is a genotype?A genotype is the genetic makeup of an organism, or the specific combination of alleles that an organism carries for a particular gene or genes.
A genotype can also be defined as the genetic makeup of an individual, specifically the combination of alleles that an individual inherits from their parents for a particular gene or group of genes.
It describes the genetic instructions that determine the characteristics of an organism. It can be represented by letters, such as A, B, C, etc. to represent different versions of a gene and different genotype combinations are represented by different letter combinations (e.g. AA, Aa, aa).
Therefore, the correct answer is as given above
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