Answer:
The answer is Mutation. (Tell me if this is not an answer choice)
Which structure is this statement most likely referring to
Answer:
semipermeable membrane is a large glucose molecule that requires facilitated diffusion but an oxygen molecule does not.
What is mars' origin of the name?
Answer:
Mars was named by the ancient Romans for their god of war because its reddish color was reminiscent of blood
Explanation:
Explain what is probably going wrong in the following scenario.
Situation: Using a range of different fertilization techniques and products, a gardener has been working to improve fertility on a stretch of lawn that had very poor, sandy soil. The gardener has added a range of soil amendments, including additions of clay, compost, peat moss, and NPK fertilizers. For a period of time the gardener seemed to succeed, and he increased his treatments. Recently, though, discolored vegetation that seems almost drought-stricken has been appearing in the grass. The gardener is now wondering what has gone wrong.
Over using of fertilizers .......Not giving time to soil to maintain its natural fertility......No leguminous crops as well...... Chemical methods of increasing production.....
Describe the three methods for harvesting stem cells, for each method, explain the benefits of the method and the ethical concerns related to the method
Answer: These stem cells are manipulated to specialize into specific types of cells, such as heart muscle cells, blood cells or nerve cells. The specialized cells can then be implanted into a person. For example, if the person has heart disease, the cells could be injected into the heart muscle.
Explanation: Describe the three methods for harvesting stem cells, for each method, explain the benefits of the method and the ethical concerns related to the method
Stem cells are specialized cells that can proliferate into many types of cells lineages. Umbilical cord blood collection, bone marrow harvesting and dental pulp collection are the methods.
What are stem cells harvest methods?Stem cells can be collected from the blood and the tissues of the umbilical cord of the baby born and is an easy method that collects the cells from the umbilical cord and the placenta for future use.
The cells and the tissues are chopped and kept in the low temperatures that include the Mesenchymal stem cells in it. They are beneficial as they can treat cancers, anaemia etc. There are not many ethical issues related to umbilical cord use.
Stem cells can be derived from the bone marrow as this is the site where they originate from. The method uses the removal of the bone marrow from the pelvic bones and subjects them to the removal of the stem cells from the blood.
Stem cells from the bone marrow are used for the replacement of damaged cells. The use of the bone marrow and using human lives is the ethical issue concerned with bone marrow based stem cells.
The dental pulp collection method of the stem cells uses the method of deriving cells from the teeth region and are a source of the bone and the mesenchymal cells.
DPSCs can be used for cell banking and are the method that has no ethical concerns. It is simple can be done in dental routines.
Therefore, umbilical cord, dental pulp and bone marrow are the stem cells collection methods.
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Question 1) Discuss how compounds in different types of organisms can be used to benefit people? ( Will Mark Brainliest).
Answer:
Compounds from different organisms are being used widely bu humans for their benefits. Some of the compounds are used as drugs. For example, penicillin is used as a drug or antibiotic. There are many plants which provides humans with other types of medicines and herbal remedies. There are other compounds which are used for cancer treatment. For example, taxol is a compound obtained from trees which are being used as anticancer drugs.
Explanation:
Why can’t a virus reproduce on its own?
Answer:
Viruses can only replicate themselves by infecting a host cell and therefore cannot reproduce on their own.At the most basic level, viruses consist of genetic material contained within a protective protein coat called a capsid; the existence of both genetic material and protein distinguishes them from other virus-like particles such as prions and viroids.They infect a wide variety of organisms: both eukaryotes (animals, fungi and plants) and prokaryotes (bacteria).A virus that infects bacteria is known as a bacteriophage, often shortened to phage.The study of viruses is known as virology, and those who study viruses are known as virologists.It has been argued extensively whether viruses are living organisms.Most virologists consider them non-living, as they do not meet all the criteria of the generally accepted definition of life.They are similar to obligate intracellular parasites as they lack the means for self-reproduction outside a host cell, but unlike parasites, viruses are generally not considered to be true living organisms.A primary reason is that viruses do not possess a cell membrane or metabolise on their own - characteristics of all living organisms.Examples of common human diseases caused by viruses include the common cold, the flu, chickenpox and cold sores.Select ALL the correct answers.
A mother has blood type A and her son has blood type O. Which blood types are possible for the father?
A
O
AB
B
Answer: Blood types O, A, and B are possible for the father.
Explanation: Since the mother has type A blood, there are two possible genotypes that she can have: AA or AO. Since her son has type O blood, he only has one genotype: OO.
For blood types,
Type A - AA or AO
Type AB - AB
Type B - BB or BO
Type O - OO
* A and B are dominant over O.
Now we have to do crosses between the mother and the father:
AA mother with AB father: child with type AA or type AB blood
AO mother with AB father: child with type AA, AO, AB, or BO blood
AA mother with OO father: child with AO blood
AO mother with OO father: child with AO or OO blood
AA mother with AA father: child with type AA blood
AA mother with AO father: child with type AA or AO blood
AO mother with AA father: child with type AA or AO blood
AO mother with AO father: child with type AA, AO, or OO blood
AA mother with BB father: child with type AB blood
AA mother with BO father: child with AB or AO blood
AO mother with BB father: child with AB or BO blood
AO mother with BO father: child with AB, AO, BO, or OO blood
The father can have blood types O, A, or B.
In a population of cattle, the average body fat percentage is 10.5%. You select parents with an average body weight percentage of 20.8%. The offspring they produce have an average body weight percentage of 17.6%. Based on these data, what is the narrow-sense heritability of this trait
Heritability in the narrow sense -h²- refers to the proportion of the phenotypic variability that is influenced by genetic factors. In the exposed example, the narrow-sense heritability of this trait is h² = 0.689 ≅ 0.7
-----------------------------
Before answering the question, let us first review a few concepts.
The selection differential, SD, is calculated by getting the difference between the mean value of the desired trait in the population (X₀) and the mean value of the same trait expressed by parents, (Xs). So,SD = Xs - X₀
Heritability in the narrow sense -h²- is the measure of the genetic component to which additive genetic variance contributes.It referes to the proportion of the phenotypic variability that is influenced by genetic factors.
The heritability might be used to determine how the population will respond to the selection done, R.
h² = R/SD
The response to selection (R) refers to the metric value gained from the cross between the selected parents. R can be calculated by multiplying the heritability h² with the selection differential, SD.R = h²SD
R also equals the difference between the new generation phenotypic value (X₁) and the original population phenotypic value (X₀),
R = X₁ - X₀
Now that we know these concepts and how to calculate them, we can solve the proposed problem.
Available data:
Population average body fat ⇒ 10.5% ⇒ X₀ Selected parents average body weight ⇒ 20.8% ⇒ XsOffspring average body weight ⇒ 17.6% ⇒ X₁We ned to get the narrow-sense heritability of this trait, h².
h² = R/SD
R = X₁ - X₀ = 17.6% - 10.5% = 7.1%SD = Xs - X₀ = 20.8% - 10.5% = 10.3%
h² = R/SD = 7.1% / 10.3% = 0.689 ≅ 0.7
The narrow-sense heritability of this trait is h² = 0.689 ≅ 0.7
-------------------------------------
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Viruses can not grow in nutrient media. Why ?
Answer:
Viruses are obligate intracellular parasites and cannot grow on inanimate media. They need living cells for replication, which can be provided by inoculation in live animals among other methods used to culture viruses (cell culture or inoculation of embryonated eggs).
You advise your pregnant friend to give her cat away becauseA. She could contract plague.B. She could give the cat tularemia.C. She could get toxoplasmosis.D. She could get listeriosis.E. You do not like cats and want to see your friend without one.Reset Selection
Answer:
c. she could get toxoplasmosis
Explanation:
she would be exposed to cat litter; cat litter usually carries those parasites that cause toxoplasmosis.
Psychologists have long determined that intelligence tests contain cultural items that depend on language in assessments. To support various cultural backgrounds and minimize bias they created which types of tests?
Answer: Cultural fair IQ tests
Explanation: A culture-fair test is test designed to be free of cultural bias, as far as possible, so that no one culture has an advantage over another. The test is designed to not be influenced by verbal ability, cultural climate, or educational level.
Psychologists have created Culture fair test that is free from cultural biases and based on logic.
Culture fair test:
These are the IQ test that based on pure logical reasoning and free from the cultural and language biases.
They are Pictorial hence, very entertaining.The question in the Culture fair test are ordered in increased difficulty level.Therefore, Psychologists have created Culture fair test that is free from cultural biases and based on logic.
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The following image gives a basic diagram of a typical moss plant. Label some of the important parts of the plant, and identify which structures represent the sporophyte and gametophyte phases.
An illustration shows a moss plant. The leaf-like parts and rhizoids are labeled as C and D respectively. Together they are labeled as B. The top portion of the plant is labeled as A.
Need answers for A,B,C,D I have included the multiple choice answers below.
Answer:
for the first one its the second one i could not see the others
Explanation:
Which of the following statements regarding digestion and absorption of carbohydrates is TRUE? Lactose intolerance results from an insufficiency of the enzyme amylase. Digestible polysaccharides are broken down into the monosaccharides glucose, galactose, and fructose, which can be absorbed. Sucrose is the main form of carbohydrate that can be absorbed by active transport across the intestinal epithelium. Carbohydrate digestion begins in the stomach. Cellulose from plants is a polymer of glucose that can be easily digested and absorbed by the human GI tract.
Answer:
CARBOHYDRATE DIGESTION AND ABSORPTION
For dietary carbohydrates to be utilized by the body, they must be converted during digestion to monosaccharides. In addition to starch, the other major dietary carbohydrates are the disaccharides lactose and sucrose, and the monosaccharide fructose. The monosaccharides produced by complete digestion of these dietary carbohydrates are glucose, galactose, and fructose.
The digestive process begins with salivary amylase, which randomly cleaves the α-1,4 linkages of starch. Although amylase digestion begins in the saliva, pancreatic α-amylase is more important to the complete digestion of starch (Fig. 19-1). Starch is degraded first to dextrins and then to a mixture of glucose, maltose, and isomaltose (containing the α-1,6 linkages that are not digested by amylase).
The major disaccharidases, located in the brush border of the intestinal lumen, are
•
Maltase—hydrolyzes maltose
•
Sucrase-isomaltase—hydrolyzes sucrose and isomaltose
•
Lactase—hydrolyzes lactose
Whenever lactose goes undigested, it is not absorbed and passes into the large intestine. Here lactose is acted on by the intestinal flora that ferment it, producing large quantities of CO2, hydrogen gas, methane, and organic acids; the last irritate the intestines, increasing intestinal motility. All these products have only one way out. Thus, the symptoms that characterize lactose intolerance are bloating and flatulence and, in extreme cases, a frothy diarrhea. Lactose intolerance is least common in Northern Europeans and their descendants and most common in descendants of Asian, African, and South American origin.
HISTOLOGY
Brush Border Dynamics
The unstirred brush border of the intestinal lumen consists of finger-like processes, known as microvilli, of the surface absorptive cells. Many enzymes associated with the process of digestion and absorption are located on the surface of these microvilli. This allows the products of digestion such as free fatty acids, amino acids, and monoglycerides to be absorbed by the cells rather than be swept into the lumen itself.
If a nucleus has eight chromosomes following replication, how many chromatids does it have?
Answer:
It has 16 chromatids
Explanation:
Since each chromosome has 2 chromatids
Use the story below to fill in the questions.
A) Origin and development
B) Earth
C) Life
D) Early technologies
Answer:
letter A
Explanation:
because the story about the creation of the Maya Narration is discuss about the past world earth who there was no light,no electricity,no cellphone,no have technologies and it's silence after so many people have come and birth in the world,so many changes have done,we have now connection in our society in social and in reality,that ultimately is producing true,and enduring.
Jennipher was asked by her mother to take a certain kind of fish in a bucket full of water so that she can prepare it for meal.when jenipher touched the fish she felt like an electric shock to her hand. what behavioural mechanism did the fish generate?
The fish use reacting behavioural mechanism in order to protect itself from the danger.
The fish uses reacting behavioural mechanism when the fish sense any type of danger surrounds it. This behaviour is a type of defense mechanisms which is used to defend and protect itself.
The fish apply electric shock in order to protect itself from the attackers and give harm to the other organisms which comes in contact with it so we can conclude that the fish use reacting behavioural mechanism in order to protect itself from the danger.
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A researcher sequences the genome of a variety of bacterial and eukaryotic cells. She finds that the bacterial genome is smaller, but that there are more genes for a given number of base pairs in the eukaryotic cells. In other words, there are fewer genes per unit of length of DNA in the eukaryotic cells. What do you predict she will find if she examines the DNA more closely
From this observation, it is possible to conclude that there are more repetitive sequences in the eukaryotic DNA than in the bacterial DNA. Prokaryotic genes do not contain introns.
Introns are internal non-coding segments of eukaryotic genes that must be removed to produce the final mature mRNA.
In prokaryotic genomes, there are no introns, and genes are expressed in groups known as operons.
Eukaryotic genomes contain highly repetitive intergenic (regulatory) and intragenic (introns) non-coding regions.
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anyone know what crystal this is?
Answer:
its a diamond crystal because its
5. member of the group that includes
dogs, wolves, and foxes
Canines, also called canids, include foxes, wolves, jackals, and other members of the dog family (Canidae). They are found throughout the world and tend to be slender long-legged animals with long muzzles, bushy tails, and erect pointed ears. This is a list of canines ordered alphabetically by genus.
A control can be best defined as:
A) a variable that is kept constant in an experiment
B) an experiment where the final results are known ahead of time
C) a hypothesis that regulates the results of an experiment
D) an experiment that is undertaken both in the field and in the laboratory
E) a variable that changes during the course of an experiment
Answer:
A) a variable that is kept constant in an experiment
1
Which two ways do the black-tailed jackrabbit and the kit fox interact with the
desert environment?
Select two correct answers.
A
Black-tailed Jackrabbits and Kit Foxes interact with the desert
environment by providing food for plants.
Black-tailed Jackrabbits and Kit Foxes use water and air from the
environment to survive.
B
>
с
Black-tailed Jackrabbits and Kit Foxes obtain energy from consuming
other organisms.
Black-tailed Jackrabbits and Kit Foxes consume plants but do not
need the environment for survival
D
E
Black-tailed Jackrabbits and Kit Foxes meet their needs in their
environment by eating only plants for food.
Answer:
b
Explanation:
5. Cranberries have a pH between 2.3 and 2.5. This makes them an
Answer:
Cranberry Juice pH
Explanation:
Foods that have a pH above 7.0 are considered alkaline, while those with a pH below 7.0 are acidic. Cranberry juice typically features a pH of between 2.3 and 2.5, making it a fairly acidic beverage.
Can Glucose turn into fat
Answer:
yea
Explanation:
If u consume to much or have diabetes its cant run it so it turns into fat
Tapeworms can reproduce by _____.
Answer:
There you go! they explained it better than I could. hopefully that helps you, for more information you could simply look up an article.
Describe changes in Earth's atmosphere and oceans
Over time.
please help me i really would appreciate it
Answer:
i think it's the S phase
Explanation:
During the S phase, DNA replication occurs.
Solar radiation can cause skin cancer in an individual. If a man with skin cancer caused by solar radiation has offspring, which of the following statements would be true? A. only the man getting skin cancer would be affected B. only the man and his male offspring would be affected C. only the man and his female offspring would be affected D. the man and all of his offspring would be affected
Human embryonic development is the development and formation of the human embryo. It is characterized by the process of cell division and cellular differentiation of the embryo that occurs during the early stages of development. In biological terms, the development of the human body entails growth from a one-celled zygote to an adult human being. Choose ALL of the statements that correctly describe stages in human embryology and gestation.
The normal period of gestation is about 40 weeks.
The germinal stage refers to the time from fertilization through the development of the early embryo until implantation is completed in the uterus in about 21 days.
The stages of human development include, in order: zygote, blastocyst, embryo, and fetus
A blastocyst, if untouched and allowed to remain implanted, will eventually develop into a morula.
Changes to the form of the embryo come from differentiation and growth.
The statements that correctly describe gestation are: the normal period of gestation is about 40 weeks; the stages of this process include: zygote, blastocyst, embryo, and fetus; and changes to the form of the embryo come from differentiation and growth.
The gestation period in humans lasts about 40 weeks and comprises different stages and processes from conception until birth. The main stages of this process include:
Zygote: Fertilized ovum.Blastocyst: Cluster of cells that is the result of the zygote going through cell division.Embryo: Unborn human that is still developing, usually before the 8th week of gestation.Fetus: Unborn human in development after the 8th week of gestation.Moreover, this process implies differentiation as cells specialize for specific functions, for example, muscle cells or nerve cells, and growth as the number of cells increases and therefore the embryo or fetus increases in size.
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Answer:
Many different types of cells make up the human body. Therefore, it is important for cells to differentiate to form different types of tissue. The tissue can then combine to form different organs and systems that carry out specialized functions for the human body.
Explanation:
Natural selection, adaptations, genetic variation, and population evolution are all related in terms of changes in phenotypes over
time. Evaluate which statement appropriately describes the relationship between the concepts of natural selection, adaptations,
genetic variation, and population evolution and select the best choice.
A)
8)
Genetic variation exists in a population. Some of the genetic variation
results in different phenotypes. The phenotypes that enhance survival are
called adaptations. Individuals with well-adapted phenotypes are more
Likely to survive and reproduce, leading to population evolution over
generations.
Adaptations exist in certain individuals in a population. The increase in
adaptations causes an increase in genetic variation. The adaptations that
enhance survival lead to larger populations, which further increases
genetic variation. Individuals with well-adapted phenotypes are more
Likely to survive and reproduce, leading to population evolution over
generations.
Genetic variation is high in a population, but random events cause it to
decrease. Populations with fewer individuals and lower genetic diversity
are able to undergo natural selection when selective pressures are high.
The increase in selective pressure causes an increase in adaptations that
are better suited for survival This results in an evolutionary change of a
population
Selective pressures exist in nature and cause changes in a population.
Populations with high selective pressures have higher rates of genetic
change, leading to an increase in genetic variation, Increased genetic
variation leads to some individuals having well-suited adaptations. The
presence of these new adaptations is evidence that the population has
changed, or undergone evolution
o
D)
Answer:
A is the answer
Explanation:
I'm just guessing
Genetic variation exists in a population. Some of the genetic variation results in different phenotypes. The phenotypes that enhance survival are called adaptations. So, the correct option is A.
What is Genetic variation?Genetic variation among members of the same species is called genetic variation. This variation may be due to variations in gene expression, DNA sequence and epigenetic changes. Mutation, genetic recombination, and genetic drift are causes of genetic variation, which can be altered by environmental variables including exposure to chemicals or climate changes.
Genetic diversity is important because it gives natural selection a starting point to work from, helping organisms to adapt and change over time. There is genetic diversity within a population. Different phenotypes are the result of some genetic variation. Adaptations are traits that improve survival.
Therefore, the correct option is A.
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Your question is incomplete, most probably the complete question is:
Natural selection, adaptations, genetic variation, and population evolution are all related in terms of changes in phenotypes over time. Evaluate which statement appropriately describes the relationship between the concepts of natural selection, adaptations, genetic variation, and population evolution and select the best choice.
1. Genetic variation exists in a population. Some of the genetic variation results in different phenotypes. The phenotypes that enhance survival are called adaptations. Individuals with well-adapted phenotypes are more likely to survive and reproduce, leading to population evolution over generations.
2. Adaptations exist in certain individuals in a population. The increase in adaptations causes an increase in genetic variation. The adaptations that enhance survival lead to larger populations, which further increases genetic variation. Individuals with well-adapted phenotypes are more Likely to survive and reproduce, leading to population evolution over generations.
3. Genetic variation is high in a population, but random events cause it to decrease. Populations with fewer individuals and lower genetic diversity are able to undergo natural selection when selective pressures are high. The increase in selective pressure causes an increase in adaptations that are better suited for survival This results in an evolutionary change of a population.
4. Selective pressures exist in nature and cause changes in a population. Populations with high selective pressures have higher rates of genetic change, leading to an increase in genetic variation, Increased genetic variation leads to some individuals having well-suited adaptations. The presence of these new adaptations is evidence that the population haschanged, or undergone evolution.
Which organelle is only
found in plant cells?
A. chloroplasts
B. cell membrane
C. nucleus
D. mitochondria
Answer:
Chloroplasts Is the answer you are looking for.
Hope this helps!