Natural selection ensures that the fittest lizard survive by transferring the gene for survival to their offspring, preventing extinction.
Which of the following scenarios best exemplifies lizards' method of selection?According to an article published published this week in Nature, lizards that can securely cling to bushes are often more likely to withstand hurricanes – an instance of natural processes at action.
Hurricanes and other natural catastrophes can have catastrophic effects on ecosystems and cause widespread fatalities. However, it is unclear whether hurricane deaths are random or if they favor those with particular physical characteristics, such the capacity to withstand gale-force winds.
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Which chemical leads to a pleasurable sensation when released in the brain, such as in response to nicotine?.
Your bloodstream carries nicotine to your adrenal glands, which are located above your kidneys.Your heart rate, respiration, and blood pressure all rise as a result of the glands releasing adrenaline.You experience a lot of positive emotions at once when taking adrenaline.
How does nicotine cause a pleasant feeling?
The body is stimulated by the adrenaline surge, which raises heart rate, blood pressure, and breathing rates.Nicotine stimulates the brain's reward circuits, which control reinforcement and pleasure perception, just like other substances do. The idea that the hunger and mood disorders linked to nicotine withdrawal may be caused by reduced serotoninergic transmission is supported by the fact that nicotine stimulates brain serotonin production while nicotine withdrawal has the opposite effect (4, 5). Cigarettes contain nicotine, a bioactive substance that stimulates the central nervous system's nicotinic acetylcholine receptors (nAChRs) to provide pleasant effects.Nicotine dependency results from the central nervous system's plasticity being altered by repeated nicotine consumptionNicotinic acetylcholine receptors that are found in the brain are where nicotine mostly manifests its effects.It increases Ach release and metabolism by stimulating presynaptic acetylcholine receptors.It also stimulates the dopaminergic system, raising the level of dopamine in the nucleus accumbens as a result. Dopamine, serotonin, norepinephrine, acetylcholine, gamma-aminobutyric acid, and glutamate are just a few of the neurotransmitters that are increased in release when nicotine binds to nicotinic receptors in the brain. Serotonin and dopamine may be released when nicotine is administered acutely (23), but chronic nicotine administration to rats has been demonstrated to reduce serotonin levels and serotonin biosynthesis (24, 25). Dopamine is released into the brain within seconds of inhaling cigarette smoke, vape mist, or chewing tobacco, which makes people feel good.People need to consume more and more cigarettes to achieve the same positive feeling over time as their brain starts to want the effects of Nicotinic receptor agonists include nicotine and ACh.Nicotinic receptors bind to nicotine and ACh, which results in a conformational shift that either opens or closes the receptors' ion channels, altering the functional state of the receptors. Nicotine, which is highly addictive, is a component of both smoking and vaping.It has been established that smoking causes cancer, which can be fatal.However, it has been established that vaping can lead to fatal lung diseases.The truth is that smoking is deadly.To learn more about nicotine refer
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Question 4 of 10
What is the purpose of a conclusion?
A. To predict how something will turn out
B. To explain why the data support or reject the hypothesis
OC. To collect or analyze the experimental data
D. To make an educated guess about a particular question
SUBMIT
A conclusion's purpose is to forecast how something will turn out.
What is the experiment's conclusion?The purpose of the conclusion is to analyze what you have presented in the project, as well as to approve the problem statement and finish the project.It also includes the approval of the problem statement, information presented in the project and analysis, and new information that is not relevant to the project or presentation.The amount of conclusion can be changed by making it larger and analyzing more specific things, as well as editing more grammar errors. The conclusion can bring together the main points in your assignment.It establishes the premises and shows how they come together to support your claim, which means it briefly revisits each key point.So here correct answer is Option A) To predict how something will turn out.
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terms used to describe factors (or sets of factors) that limit population size include group of answer choices density-dependent and independent limiting factors. extrinsic and intrinsic limiting factors. all of these are correct. environmental resistance.
Terms used to describe factors (or sets of factors) that limit population size include, density-dependent and independent limiting factors, extrinsic and intrinsic limiting factors. So option (d) all of the above is correct.
Limiting elements in the natural environment, such as access to food, water, shelter, and space, can alter animal and plant populations. Populations may also be affected by other limiting factors like as competition for resources, predatory behavior, and sickness.
A population's per capita growth rate changes—typically declines—with rising population density due to density-dependent limiting constraints. One illustration is how individuals of a group compete for scarce food.Independent of population density, certain factors affect per capita growth rate. Natural catastrophes like forest fires are examples.
Diverse limiting variables can interact in intricate ways to produce different patterns of population expansion. Some populations exhibit cyclical oscillations, where the population size varies cycle by cycle in a predictable manner.
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A person can have hundreds of different type of cells because:different cells result from genetic variation in meiosis.different cell types have different genes.different cell types all have the same genes but have different genes active.None of these choices is correct.
Humans have specialized cells in the body. Each cell type performs a unique function. Humans have different type of cells with different structures and functions.
All the cells in a human's body contain the same DNA. However, the human body is composed of many different types of cells. Because of gene regulation, each cell type possess a different set of active genes although all the cells of the body contain the same DNA.
Answer - different cell types all have the same genes but have different genes active.
what makes this chart a climate representation and not one that shows the weather
A climate graph is a chart that displays the typical weather for a specific time period and area. A bar graph is used to display the amount of precipitation, while a line graph is used to display the temperature.
What is climate graph?Climate graphs display the typical levels of precipitation and temperature for a location. A line graph displays the temperature, while a bar graph displays the amount of rainfall. The months of the year run down the base of the representation, which is often on the same set of axes.
Why is a climate graph important?Scientists and meteorologists use climate graphs to determine long-term averages over a 12-month period. As a result, climate graphs are effective at illuminating a location's seasonal climate but are not a very excellent source for specifics about the location's climate.
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Which activity of the polymerase is responsible for degrading the pre-genomic rna during hepatitis b dna replication?.
RNase H activity of the polymerase is responsible for degrading the pre-genomic rna during hepatitis b dna replication.
What is the function of polymerase?DNA polymerases' major function is to efficiently and properly replicate the genome in order to maintain the genetic code and ensure that it is faithfully passed down through the generations.
What does DNA polymerase do?A double-stranded DNA molecule is duplicated into two identical DNA molecules during the process of DNA replication, which is carried out by DNA polymerase. With the help of the polymerase chain reaction, generally known as PCR, scientists have been able to duplicate DNA molecules in test tubes.
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Which best describes mitochondrial DNA (mtDNA)?
Mitochondrial DNA is the same as nuclear DNA.
Mitochondrial DNA is inherited through the father.
Mitochondrial DNA can be traced for generations.
Mitochondrial DNA requires large amounts for testin
Mitochondrial DNA can be traced for generations best describes mitochondrial DNA (mtDNA).
Mitochondrial DNA is the circular chromosome found inside the cellular organelles called mitochondria. Located in the cytoplasm, mitochondria are the site of the cell's energy production and other metabolic functions. Offspring inherit mitochondria and as a result mitochondrial DNA from their mother.
The mitochondrial genome is circular, whereas the nuclear genome is linear. The mitochondrial genome is built of 16,569 DNA base pairs, whereas the nuclear genome is made of 3.3 billion DNA base pairs. Unlike the DNA inside the nucleus, it is not a mixture of our parent's DNA, and each person's mtDNA is nearly identical to his or her mother's mtDNA.
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How would the structure of nucleotides in a dna molecule affect the structure of amino acids in a protein
DNA determines which amino acids make a protein by the combination of three nucleotides. Each set of three nucleotides is called a codon and each codon corresponds to a particular amino acid, although an amino acid can be coded by multiple codons because there are only 22 aminoacids.
This is known as the genetic code:
We know when we are moving up and down in an elevator because of the movemnt of tiny crystals in the
We know when we are moving up and down in an elevator because of the movement of tiny crystals in the otolith organs.
The sacculus and the utricle are the two otolith organs present in humans. These organs are responsible for sensing of gravity and also help in linear motions.
There are tiny crystals present in the otolith organs that help in linear motons or detecting when we are moving up or down. These crystals are termed as otoconia and are primarily made up of calcium carbonate.
These otoconia are responsible for detecting vertical movements and are present in the ear.
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What kind of mathematical relationship seems to exist between the length of the ulna and the height of an individual?
(Pearson's correlation )interpreted a very high significant (P < 0.001) relation between the length of the ulna and the height. The regression equation was derived to estimate the height of an individual from the length of the ulna in males and females.
The kind of mathematical relationship that seems to exist between the length of the ulna and the height of an individual is Pearson's correlation.
What is Pearson's correlation?The Pearson correlation coefficient (r) is the most commonly used metric for determining a linear relationship. It is a number ranging from -1 to 1 that indicates the strength and direction of a link between two variables. When one variable shifts, the other shifts in the same way.
Pearson's correlation revealed a highly significant relationship between ulna length and height. The regression equation was developed to estimate an individual's height from the length of the ulna in males and females.
Therefore, the mathematical relationship that exists is Pearson's correlation.
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How can a balanced reciprocal translocation that does not cause the person to have an abnormal phenotype cause that person’s offspring to have an abnormal phenotype?.
In a balanced reciprocal translocation, chromosomes are arranged in such a manner that no chromosome material gets gained or lost in the process.
A person who carries balanced translocation is usually unaware of the fact that he or she is having this sort of problem unless they give birth to a child. If one of the parents carries a balanced translocation, then it may possible that the child may inherit an unbalanced translocation in his life.
In an unbalanced translocation, the exchange of chromosomal material is unequal resulting into extra or missing genes. However, it is not necessary that if a parent has balanced translocation then he or she will always pass it on to the child.
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Put the steps of the Calvin Cycle in the correct order. Watch the video as many times as you need to understand this process.
1. The enzyme used in this reaction is called Rubisco and results in an unstable 6 carbon molecule that quickly splits into two three carbon molecules called 3-phosphoglycerate
2. ADP and NADP+ return to the thylakoids to be converted back to ATP and NADPH by the light reactions.
3. NADPH and ATP are used to in CO2 reduction where3PG is reduced to form G3P.
4. The cycle turns 6 times to form a glucose molecule.
5. ATP is used to combine the rest of the G3P molecules to form RuBP molecules
6. CO2 is attached to RuBP, a 5 carbon molecule
The correct order of the steps of Calvin cycle are:
6. CO2 is attached to RuBP, a 5 carbon molecule.
1. The enzyme used in this step is called Rubisco and the resultant is an unstable 6 carbon molecule that instantly splits into two three carbon molecules known as 3-phosphoglycerate.
3. NADPH and ATP are used to in CO2 reduction where 3PG is reduced to form G3P.
2. ADP and NADP+ come back to the thylakoids to be converted back to ATP and NADPH by the light-dependent reactions.
5. ATP is used to combine the remaining G3P molecules to form RuBP molecules.
4. The cycle turns 6 times to form a glucose molecule.
Calvin cycle is an important part of the light-independent reaction. It is involved in the synthesis of glucose molecules.
Rubisco stands for Ribulose-1,5-bisphosphate carboxylase-oxygenase. It is the most abundant enzyme present in the Earth.
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Algor mortis, or postmortem cooling of the body, varies with ambient temperatures. Based on the results of your experiment, how does ambient temperature affect the rate of cooling of a body after death? explain your answer. Include how this might affect the use of the glaister equation in determining the time of death.
The ambient temperature affect the rate of cooling of a body after death occurs depends on the temperature differential between the body and the environment.
How long does it take for the body to cool down after death?Once vital functions cease, the body cools at an average of 1°C to 1.5°C per hour. Considering that the average temperature of a human being is between 36 °C and 37 °C, the corpse reaches the ambient temperature in 24 hours at most.
The higher the ambient temperature, the more important the evaporative heat loss will be. In fact, when ambient temperature is higher than body temperature, the only way to lose heat is through evaporation. Human beings lose heat through sweating.
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which organisms do not use nadh to feed electrons into mitochondrial electron transport chains? group of answer choices animals that do not maintain a constant body temperature plants animals that maintain a constant body temperature eukaryotic algae bacteria and archaea
The statement "animals that do not maintain a constant body temperature" is correct, they are the organisms that do not use NADH to feed electrons into mitochondrial electron transport chains.
Animals that do not keep a constant body temperature do not need NADH and do not consume NADH during respiration, as NADH is needed for maintaining a constant body temperature and is thus required by the organism.
The second method uses the respiration process used by bacteria and archaea, which uses NADH. The eukaryotic algae in the third option employ NADH in respiration since eukaryotes often do so. In the fourth option, animals must use NADH for respiration in order to keep their body temperatures constant.
If NADH is not available, oxidative phosphorylation reactions uncouple, which maintains the body temperature. This type of reaction is seen in animals that are hibernating as well as in newborn animals and people.
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a(n) is a site within a chromosome that serves as the starting point for dna synthesis. here, the two dna strands unwind, and replication proceeds outward in opposite directions from this site. this provides an opening called a(n) that forms two .
The origin of replication is a site within a chromosome that serves as the starting point for DNA synthesis.
This provides an opening called a replication fork those forms two DNA.
DNA union begins at a particular put on a chromosome called a root. Within the begin-with instrument, one girl strand is started at the beginning on one parental strand and the moment is started at another root on the inverse parental strand.
In this way, as where one strand develops from each root. A few infections utilize this sort of component.
DNA replication may be a handle that happens amid cellular division where two indistinguishable particles of DNA are made from a single atom of DNA.
As a semiconservative prepare, a single particle containing two strands of DNA in a twofold helix arrangement is isolated, where each strand serves as a layout for the modern DNA particles.
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Help help please help help me help help please help help
Answer: Q1. The primary function of the plasma membrane is to protect the cell from its surroundings. Composed of a phospholipid bilayer with embedded proteins, the plasma membrane is selectively permeable to ions and organic molecules and regulates the movement of substances in and out of cells.
Q2. The phospholipids in the cell membrane are arranged in two layers, called a phospholipid bilayer. Each phospholipid molecule has a head and two tails.
Hope this helps!
nitrogen is an essential element for living things, as demonstrated by the fact that nearly all fertilizers contain nitrogenous compounds. describe two macromolecules that have nitrogen. discuss their structural and functional roles to explain why nitrogen is essential for cellular life.
Two macromolecules that have nitrogen are nucleic acids and Amino acids.
When it comes to the chemical composition of living organisms, nitrogen is one of the most crucial components. Numerous macromolecules, including amino acids, fatty acids, and nucleic acids, are created using nitrogen. It is clear that nitrogen is necessary for life because amino acids are the building blocks of proteins and nucleic acids make up our genetic makeup.
Our bodies' muscles, tissues, and organs are all made of proteins, as are several hormones that are essential to their normal operation. Our DNA is carried by nucleic acids, which is essential for passing genetic information from one generation to the next.
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When the ground becomes saturated in a rain storm and the excess cannot be soaked up, the water will travel along the ground until it hits a low-lying area or a larger body of water. The water that is not absorbed into the ground, including the larger body of water, is _______.
A.
groundwater
B.
a puddle
C.
fertilizer
D.
surface water
The water that is not absorbed into the ground, including the larger body of water, is surface water and is denoted as option D.
What is Surface water?This is referred to as the body of water which is present on a terrestrial surface such as land etc.
Examples of surface water include rivers, oceans etc and they comprise of the water that is not absorbed into the ground to form what is known as ground water due to different types of factors and parameters which is therefore the reason why option D was chosen as the most appropriate choice.
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The bigger body of water, as well as the water that is not absorbed into the earth, is considered surface water. Thus, option D is correct.
What are the factor in formation of surface water?Rainfall is the principal source of surface water. It is a mixture of groundwater and surface runoff.
Groundwater and surface water are intimately related. Through the pores and fissures in the soil, sand, and rocks, some surface water seeps deep into the ground.
Runoff is the term for the surface water that results from precipitation and melted snow.
Therefore, The water that is not absorbed into the ground, including the larger body of water, is surface water.
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Imagine there are zebras elephants and meadow argus butterflies in the local ecosystem. which biome are they most likely in? tundra tropical rainforest grassland temperate forest
Answer: the answer is grassland
cause Plains zebras live in savannas and temperate grasslands (plains). Savannas are large areas covered with grass and other plants, as well as some trees, while plains have grass and few to no trees at all. As you can imagine, plains zebras eat mostly grass and so are elephants are grassland animals too Due to their habitat, savanna elephants are often found grazing on grasses, but they also browse on a wide variety of plants and fruits. This selection varies depending on the time of year; during the rainy season the elephant will feed more on grass than during the dry season. hops this helps .
Explanation:
What is the phrase that is most closely associated with natural selection?
Natural selection is the process in which the population with the best adaptation is favorable. It is usually associated with the phrase "survival of the fittest".
from a viable plate count you obtained the following results after diluting a bacterial sample and plating 0.20 mls of the dilutions on various media: how many cfu/ml were in the original sample?
The original sample is 2 ml. So after dilution it is 0.2 ml.
What is dilution?An object that dissolves in a solvent is referred to as a solute. A solvent is something that allows a solute to dissolve and form a solution.
Typically, a liquid is a solvent, while a solid is a solute. Solutions are uniformly constituted or homogenous mixtures.
When compared to a diluted solution, a concentrated solution has a substantial amount of solute dissolved into it. A diluent is something we employ to thin out a solution. A serial dilution is a different kind of dilution. When we continually diluted a stock, we experienced the second sort of dilution.
Therefore, The original sample is 2 ml. So after dilution it is 0.2 ml.
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Fur color in animals is frequently controlled by more than one gene. However, brown fur in rabbits is dominant over white fur. A white female gives birth to all white rabbits, even though the father had brown fur. Show how this is possible. (5 pts)
Genotype: Phenotype
(Punnett square pls)
It is possible for a white female rabbit to give birth to all white rabbits even if the father had a brown fur. This is largely due to chance.
Chance in geneticsLet us first consider the cross in question.
Brown fur is dominant over white fur. Assuming the brown allele is B while the white allele is b, a brown rabbit will have a genotype of either BB or Bb. A white rabbit, on the other hand, can only have a bb genotype.
This means that the genotype of the female rabbit will be bb. If the genotype of the brown fur father is BB:
BB x bb
Bb Bb Bb Bb
All the offspring will have brown fur since B is dominant over b.
In other words, the genotype of the father rabbit can only be Bb.
Bb x bb
Bb Bb bb bb
Genotype ratio = 50% Bb : 50% bb
Phenotype ratio = 50% brown fur : 50% white fur
The chances of producing white fur offspring is 50% while that of brown fur offspring is also 50%. Given enough population of offspring, these chances will reflect.
However, with a small population of offspring, it is possible for either of the fur colors to be dominant. An all-white or all-brown fur offspring can result in a small population.
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Identify the cell organelles found only in plant cells and those found in both animal and plant cells.
Answer:
Animal cells each have a centrosome and lysosomes, whereas plant cells do not. Plant cells have a cell wall, chloroplasts and other specialized plastids, and a large central vacuole, whereas animal cells do not.
More energy can be released from fat molecule than from glucose molecule because the fat molecule contains more
Answer:
chemicals bonds
Explanation:
the more bonds, the more energy released!
what would a man made biosphere built by you look like? how would it work?
A biosphere built by me will have the presence of plants, animals, microbes and other resources which are beneficial to the ecosystem.
What is a Biosphere?This is referred to as the portion of the earth which is characterized by the presence of different types of life forms.
A good biosphere must have a constant food supply which is ideal for the growth and survival of the organism. It is best to have plants as they are the primary producers and provide food to other animals. Microbes help in decomposition and other processes and will ensure they are present so as to reduce pollution.
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ANSWER PLEASEEEEEEEEE
pls help due now!!!!!!!!!!
Answer:
a
Explanation:
(20!!!!! PLS HELP)Select the type of inheritance pattern that is best described below:
Independent genes at four different loci are responsible for determining an individual’s HLA tissue tip, important in organ transplants and certain diseases.
a. Pleiotropy
b. Codominance
c. Polygenic Inheritance
d. Multiple Alleles
e. Incomplete Dominance
Polygenic Inheritance in which independent genes at four different loci are responsible for determining an individual's HLA tissue type, important in organ transplants and certain diseases.
Polygenic inheritance refers to the inheritance of a trait governed by more than one genes. More then three genes govern the inheritance of polygenic traits. Multiple independent genes have an additive or similar effect on a single quantitative trait.
Human height and color of skin and eyes occurs due to several genes, so it is an example of polygenic inheritance. The HLA system is inherited in a Mendelian manner and extensively polymorphic half are inherited from your mother and half from your father.
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Which molecular structures could be found in lipids but not a carbohydrate, protein, or nucleic acid?
Answer:
Proteins, carbohydrates and lipids are made from three basic molecules: carbon, hydrogen and oxygen. However, all proteins contain an element not found in carbohydrates and lipids is nitrogen.
Explanation:
a microbiologist wants to estimate the concentration of a certain type of bacterium in a wastewater sample. she puts a 0.5 ml sample of the wastewater on a microscope slide and counts 39 bacteria. estimate the concentration of bacteria, per ml, in this wastewater. round your answer to the nearest whole number.
The estimated concentration of bacteria per mL in the wastewater if she puts a 0.5 ml sample of the wastewater on a microscope slide and counts 39 bacteria is 78 counts per mL.
The solution to this problem is as simple as 39/0.5 because if you have x amounts of y/2 overall, you will have x amounts in y. (just multiplying both sides by 2, no distributions involved). For a clearer understanding see the solution below:
Let X represent the number of bacteria observed in 0.5 mL.
Let A represent the true concentration in bacteria per mL.
The X ~ Poisson(0.5A)
The observed valus of X is 39.
The estimated concentration is {A} = 39 / 0.5 = 78
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