Answer:
autism
Explanation:
autism is caused by extra chromosomes or more than 46
The endosymbiotic theory states that nonphotosynthetic prokaryotes merged with an ancestral cell and, over evolutionary time, became___________. Some of these new cells engaged in a second merging event with a photosynthetic prokaryote, possibly a cyanobacterium. The photosynthetic prokaryote eventually—over evolutionary time—became __________.
Answer:
mitochondria, chloroplast
Explanation:
According to the endosymbiotic theory chloroplast and mitochondria in eukaryotes are originated from phagocytosis of different bacteria by an ancestral cell.
The theory says that an ancestral cell engulfed a non-photosynthetic bacteria and did not digest it but evolved with it which gave rise to mitochondria in eukaryotic cells.
This theory also tells that chloroplast is originated by the phagocytosis of a photosynthetic prokaryote like cyanobacteria by ancestral cell. The genetic similarities of these organelles with bacteria proves this theory.
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Different genes are activated in the blood cell than in the liver cell.
Explanation:
All the cells in the body contain the same number of genes and genetic material DNA but not all genes are expressed in a single cell.
The highly regulated process of the genes in molecular biology promotes the expression of particular gene required.
Signals from the cell environment activate the transcription factor that binds to regulatory regions of the gene, hence transcribing and making proteins for the same.
The genes for both blood cell and the liver are different but will be present in all the somatic cells, the regulatory mechanism will choose the required gene to be transcribed.
What is the name of the endocrine mode of reflex stimulation that releases hormone(s) due to direct stimulation from changing levels of nutrients or ions in the blood?
Answer: Humoral Stimulation
Explanation:
Humoral stimulus refers to the control of hormone release in response to changes in extracellular fluids. Humoral stimulus is also as result of reflex stimulation that releases hormone due to direct stimulation from changing levels of nutrients or ions in the blood, such as the ion concentration in the blood. Some hormones are secreted in direct response to changing blood levels of ions and nutrients.
In fruit flies, the color of the eyes is sex-linked (on the X chromosome). A cross of the flies in the image will produce
a
100% white-eyed flies
b
100% of the females with white eyes, 50% of the males with white eyes.
c
100% red-eyed flies
d
100% of the females with red eyes, 100% of the males with white eyes.
A cross of the flies in the image will produce 100% of the females with red eyes, and 100% of the males with white eyes. The correct option is d.
What is crossing over?
If red eyes are represented by the R allele and white eyes by the r allele, then 100% of the females would have red eyes, whereas 100% of the males would have white eyes.
Fruit flies are one type of fly that exhibits traits associated with sex-linked genes. All of the males from the first generation of the cross will have white eyes, and 100% of the females will have red eyes.
The following genotypes and corresponding phenotypes will result from the cross:
Xr XR- red-eye, femaleXr XR - red-eye, femaleXrY - white eye, maleXrY - white-eye, maleTherefore, the correct option is d. 100% of the females with red eyes, and 100% of the males with white eyes.
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The question is incomplete. Your most probably complete question is given below: the missing image is added.
The primary source of the specificity of enzymes is ________. Select one: a. their locations within the cell b. their polarity, which matches that of their specific substrate c. their shape, which relates to the lock-and-key model d. their bonded transition metal, which is specific to the target substrate e. their delocalized electron cloud
Answer:
c. their shape, which relates to the lock-and-key model
Explanation:
The primary source of the specificity of enzymes is their shape, which relates to the lock-and-key model
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The primary source of the specificity of enzymes is their shape, which complies with the lock-and-key model, meaning the enzyme's three-dimensional structure is specifically matched to bind with its substrate.
The correct option is 'C'.
Enzymes are highly specific biomolecules that accelerate chemical reactions.
This specificity comes from the unique three-dimensional shape of the enzyme's active site, which is complementary to the structure of its specific substrate.
According to the lock-and-key model, the molecular shapes of the active site and the substrate are perfect matches, akin to a key fitting into a lock. This model emphasizes that the enzyme's structure is tailor-made to bind to its specific substrate, facilitating the chemical reaction.
Furthermore, the induced fit hypothesis suggests that while enzymes have a precise shape, they can also adjust slightly to ensure the perfect fit with the substrate, enhancing the enzyme's catalytic efficiency.
Marginal benefit is A. the difference between the highest price a consumer is willing to pay and the price the consumer actually pays. B. the additional benefit from consuming one more unit. C. the additional cost of producing one more unit. D. a legally determined maximum price that sellers may charge. Why is the demand curve referred to as a marginal benefit curve? A. It shows the price consumers actually pay to consume a product. B. It shows the difference between the highest price a consumer is willing to pay and the lowest price a firm would be willing to accept. C. It shows the difference between the highest price a consumer is willing to pay and the marginal benefit of consumption. D. It shows the willingness of firms to supply a product at different prices. E. It shows the willingness of consumers to purchase a product at different prices.
Answer:
Marginal Benefit : B. the additional benefit from consuming one more unit.
Demand Curve = Marginal Benefit Curve as : E. It shows the willingness of consumers to purchase a product at different prices.
Explanation:
Benefit is the rise in satisfaction from consumption. Marginal Benefit is the additional benefit from consuming an additional unit. So, it is addition to satisfaction with an additional consumption i.e Marginal Utility (MU).
Consumer purchases a good only if : Its marginal benefit i.e MU ≥ its marginal cost i,e price. As MU < Price implies additional benefit < additional cost, & consumer will not consume at this point.
So, Marginal Utility/ Marginal Benefit reflects consumer's willingness to pay for a good's consumption. Hence, Demand Curve is also called Marginal Benefit Curve.
PLEASE HELP ASAP (100 POINTS) AND OTHER STUFF
Read each example and identify it with one of the mechanisms that influence gene pools.
----- A zebra migrates to join a different herd of zebras.
------ Competition for sunlight leads to taller trees.
------The DNA of a snake changes to make its venom stronger.
------ A grassfire randomly sweeps through a population of buffalo and kills most of the animals.
1.Genetic drift
2.Gene flow
3. Mutation
4.Natural selection
Answer:
A zebra migrates to join a different herd of zebras. Gene flow
Competition for sunlight leads to taller trees. Natural Selection
The DNA of a snake changes to make its venom stronger. Mutation
A grass fire randomly sweeps through a population of buffalo and kills most of the animals. Genetic drift
Explanation:
Gene flow: Gene flow can be described as the transfer of genes or genetic variation from one population to another. Hence, the migration of a zebra to a different herd of zebras is a kind of gene flow.
Natural Selection: The phenomenon of natural selection favors those organisms which have better characteristics to survive in an environment. Hence, natural selection favours the taller plants.
Mutation: Mutation can be described as any change which occurs in the DNA of an organism. Hence, a change in the DNA of the snake is mutation.
Genetic Drift: Genetic drift is the change in the gene frequency of an area due to certain disastrous conditions such as a fire.
Answer:
A zebra migrates to join a different herd of zebras. Gene flow
Competition for sunlight leads to taller trees. Natural Selection
The DNA of a snake changes to make its venom stronger. Mutation
A grass fire randomly sweeps through a population of buffalo and kills most of the animals. Genetic drift
Explanation:
Kafka provides many details about how Gregor interacts with his parents. Based on these details, what can you infer about Gregor’s relationship with his mother and father? Use text evidence to support your inferences.
Answer:
Gregor's mother enquired, "Didn't you want to go somewhere" (line 89) rather than indicate that he's not early for work. Gregor's father called to the attention of how his son "sits with us in the kitchen and just reads the paper or studies train timetables" (lines 247-248), revealing how Gregor does not relate with his family. Gregor is not close to his parents.
Answer:
Gregor’s mother disapproves of her daughter’s selfish desire to alter Gregor’s bedroom.
Explanation:
Then, quietly, almost whispering as if wanting Gregor (whose whereabouts she did not know) to hear not even the tone of her voice, as she was convinced that he did not understand her words, she added “and by taking the furniture away, won’t it seem like we’re showing that we’ve given up all hope of improvement and we’re abandoning him to cope for himself? I think it’d be best to leave the room exactly the way it was before so that when Gregor comes back to us again he’ll find everything unchanged and he'll be able to forget the time in between all the easier.” ("The Metamorphosis," Part I, p. 9)
NEED HELP ASAP PLEASE!
Answer:
10. True
11. how behaviour minimizes competition
12. True
Explanation:
10. Trophic cascade can be defined s an ecological term which refers to as being triggered by the addition or removal of top predators and involving reciprocal changes in the relative populations of predator and prey through a food chain, which often results in dramatic changes in ecosystem structure and nutrient cycling.
11. how behaviour minimizes competition
12. Commensalism is the interaction between populations in which one gains from the interaction and the other is unaffected. for example, an interaction between denitrifier and annamox bacteria
It is a model organism used to study various cell and developmental processes such as the growth of developing body parts in the right place and with the correct shape. It develops from a fertilized egg to an adult in a little over a week, and has been a favorite of geneticists for almost a century. Some of its cells have giant chromosomes whose banding patterns have been extremely helpful in classical genetic studies. Which organism is it?
Answer:
Drosophila melanogaster
Explanation:
Drosophila melanogaster or fruit fly is a fly species used as a model organism by geneticists and developmental biologists which helped them awarded eight Nobel prizes.
The studies on the role of genes in developmental biology and the study of the chromosomes obtained from the salivary glands called polytene chromosomes are the topic of research in the Drosophila.
Thus, Drosophila melanogaster is the correct answer.
Answer:
Drospohila.
Explanation:
The model organisms may be defined as the organisms that are well suited for the study of the biological phenomena. The model organisms have some special characteristics that are not present in other organisms.
The qualites of the model organisms that describe in the question clearly signifies that this model organism is Drosophila. The growth pattern and correct body shape is first studied in the Drosophila. The salivay glans of Drosophila consists of giant chromosomes.
Thus, the answer is Drosophila.
Imagine that you are observing an enzyme-catalyzed reaction in the lab. Every time you add more enzyme, the reaction rate increases proportionally until the reaction rate suddenly levels off. No other chemicals were added, and no modifications were made in the experimental setting. Why do you think the reaction rate stopped increasing?
The rate of reaction stops increasing because there is no substrate left to bound with an enzyme to increase the rate of reaction.
What is an enzyme?An enzyme is a substance that increases the rate of reaction by catalyzing the reaction.
The enzyme is called a biological catalyst.
Enzyme work when it combines with the substrate of the reaction to make products.
When the enzyme is added, the rate of reaction increase because it fastens the reactions.
But when the substrate is converted into a product and there is no substrate left to combine with enzyme the rate of reaction stop increasing.
Thus, The rate of reaction stops increasing because there is no substrate left to bound with an enzyme to increase the rate of reaction.
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Final answer:
The reaction rate stops increasing due to enzyme saturation, where all enzyme active sites are fully occupied and cannot bind additional substrates, causing the rate to level off despite more enzyme being added.
Explanation:
The reason the reaction rate stops increasing even with the addition of more enzyme is due to enzyme saturation. At a certain point, all active sites of the enzyme molecules are occupied by the substrate, and they are unable to bind to any additional substrate molecules until the existing substrate is converted into product and released. This phenomenon is known as enzyme saturation, and it explains why the reaction rate levels off. It indicates that the enzymes are working at their maximum capacity, and any further increase in substrate concentration cannot enhance the reaction rate any further.
Which statement forms part of cell theory?
Answer: Option D) All living things are made up of cells
Explanation:
The cell theory states that:
- the cell is the structural and functional unit of life
- all living organisms are made of cells
- all cells come from previously existing cells
- there is no life apart from the life of cells
- all living things are either single cells (unicellular) or group of cells (multicellular)
a DNA strand witha base sequence of ACTTCGCATG when replicated would yield a newly formed strand of the same base sequence true or false
True, a DNA strand is replicated to yield a new strand with the same base sequence. This ensures genetic consistency across cell generations. The base sequence ACTTCGCATG would remain the same in the replicated strand.
Explanation:The statement is true. When a DNA strand is replicated, the resulting strand has the same base sequence as the original strand. This happens through a process known as DNA replication. Let's take the DNA base sequence ACTTCGCATG as an example. During DNA replication, each base in the sequence pairs up with a complementary nucleotide: A with T, and C with G. Therefore, for the given DNA sequence, the replicated strand would also be ACTTCGCATG, albeit in a complementary manner. Thus, DNA replication ensures genetic consistency from one generation of cells to the next.
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You observe continuous variation in tail length in a wild population of rats. Describe an experiment to determine whether this variation is an example of variable expressivity or continuous variation?
Answer:
When you grab a wild population of rats, you need to follow the scientific method as it is, and by doing that, you can discover if it is a variable expressivity or a continuous variation.
Explanation:
First, you need to check the species, to see their patterns of length of tail, because that's mostly what you want to know. After stablishing this pattern, you'll check the variability of their variation on different generations. For example, you pick up a rat that is aged a month, and a rat that is aged 3 months, and then compare them to one another. After you've done this lots of times, you can check if this variable is just a random one, or if it is continuous throughout the generations.
Chlamydomonas, which is a chlorophyte, undergoes a ____________ life cycle common to algae. In favorable conditions, it reproduces ____________ via ____________ , while in unfavorable conditions, it reproduces ____________ , producing a zygospore which undergoes a period of dormancy until conditions improve.
Answer: (a) Haploid (b) asexually (c) mitosis (d) sexually.
Explanation: Chlamydomonas which is a chlorophyte, undergoes a Haploid life cycle common to algae. In favorable conditions, it reproduces Asexually via Mitosis, while in unfavorable conditions, it reproduces Sexually , producing a zygospore which undergoes a period of dormancy until improved conditions.
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Answer:
"the genes on DNA get transcribed into RNA, which get translated into a protein"
Explanation:
The central dogma is an important principle to biology, explaining the flow of information from DNA to functions that the cell can carry out. The central dogma says DNA --> RNA --> protein. Proteins carry out most biological functions in cells and organisms.
Genes on DNA have to be copied into a message in the form of RNA. DNA and RNA use the same language, so the message is transcribed (i.e. copied). The RNA then takes this message to the protein synthesis machinery, which uses a different language. Therefore, the RNA has to be translated into protein sequences
Which statement about biological literacy is inaccurate? A.The ability to communicate ideas about biology to others is a component of biological literacy. B.Biological literacy is the ability to integrate ideas about biology into making wise decisions for oneself. Biological literacy is the ability to integrate ideas about biology into making wise decisions for society. C.Assuming that all bacteria can infect you because your mother told you so is an example of biological literacy. D.Using the process of scientific inquiry to think creatively about real-world issues that have a biological aspect is a component of biological literacy.
Answer:
Which statement about biological literacy is inaccurate?
Assuming that all bacteria can infect you because your mother told you so is an example of biological literacy
Explanation:
This not accurate as regards biology as science does not give room for guessing or assumptions, every hypothesis must have passed through rigorous processes such as observation, experiment, criticism, validation before they are either accepted or rejected in science. So the Assumption that all bacteria can infect you because your mother told you so is an example of biological literacy is not just an illusion but also a mockery of science. Every scientific studies must be validated before being published for the general public.
The situation in which some individuals have greater reproductive success than other individuals in a population. Along with variation and heritability, it is one of the three conditions necessary for evolution by natural selection.
Answer:
The situation in which some individuals have greater reproductive success than other individuals in a population. Along with variation and heritability, it is one of the three conditions necessary for evolution by natural selection.
There are so many factors that contributed to this over time, reproductive success differs and it could be attributed to hereditary and variation as well. Most often, the hereditary plays the most role out of all as the viability of both eggs and sperms could have been inherited from parents or being affected as a result of environmental factor or nutrition or other factors.
For instance, if one has a rhesus factor of negative and went ahead to marry another male counterpart with negative rhesus factor, this sedomly leads to miscarriage which could have been controlled had it been they were thoroughly counseled. Furthermore, physical factor such as accident could damage one spermatical vessicles that houses the sperm cells which render such an individual to be unable to donate a viable sperm cell for reproduction.
Those with high rate of reproductive success thrives as result of having many offspring which increases their chances of having more offspring than those with little success rate.
Explanation:
What is the most common type of skin cancer, which results in the formation of a nodule with a central "crater" that ulcerates?
Answer:
Basal cell carcinoma
Explanation:
Basal cell carcinoma is a common type of skin cancer,it appears as raised part in the skin that is painless with shiny blood vessel running over it or may be ulcerative
Answer:
Basal cell carcinoma. (BCC) .
This occurs when exposure of the skin to ultraviolet rays damaged the DNA of the exposed area by forming thymine dimer. Besides the UV exposure may also suppress the hormone surveillance mechanism ;enabling the tumour cells in the basal cells to escape the immune surveillance radar, leading to cancer growth.
Thymine dimers are formed when two thymine molecules formed a complex by co-valent bond on the same single strand of DNA. They lead to mutation when their complex is replicated as a base, leading to frameshift mutation.
Exposure to radiation especially during childhood stage, having light skin, indoor tanning (which may prompt uncontrolled growth in the basal Cells) are among other causative factors.
Its appearances vary in structure,and skin pigmentation. it does not in most cases extend beyond the local areas. However if not given proper treatment attention it may disfigure the skin,causing massive damages by growing deep into the dermis to reach the blood through the subcutaneous tissue to the bone. It may also metastasize,(spread) causing cancerous growth in other parts of the body .
Treatment involve surgical removal.
Explanation:
according the the article, which of the following statements regarding gene therapy is true?
a: gene therapy is not a suitable medical treatment for cancer.
b: gene therapy only works in cases involving diseases of the eye
c: there are risks and benefits associated with gene therapy.
d: all of the above
Answer:
The answer is C. there are risks and benefits associated with gene therapy
not b, since they used it on people/animals who were blind
not a, since 70% tests have been on cancer
Answer:
There are risks and benefits associated with gene therapy
Explanation:
Scientists are currently exploring the use of gene therapy to treat numerous illnesses. Much of the research has involved the treatment of non-infectious diseases, such as cancer and diabetes, and genetic disorders. Gene therapy is a relatively new treatment, and medical researchers are still looking into other applications of the new technology.
There are risks and benefits associated with gene therapy. Some studies, such as the Leber's congenital amaurosis study, have produced promising results. However, there have been a few cases in which patients experienced complications.
All of the following events occur during normal meiosis except _______. A. two haploid gametes fuse to form a diploid cell B. one diploid cell produces four haploid cells homologous C. chromosomes separate from one another D. during meiosis I sister chromatids separate from one another during meiosis II
Answer:
A. two haploid gametes fuse to form a diploid cell
Explanation:
Meiosis is a type of cell division. When a parent cell with "2n" chromosomes enters the process of meiosis, four daughter cells each with "n" chromosomes are formed. This occurs since homologous chromosomes separate from each other during anaphase-I. However, meiosis does not include the fusion of two haploid cells. The fusion of two haploid cells mainly occurs during the process of fertilization during which a haploid male gamete and a haploid female gamete fuse to form a diploid zygote.
All stated events occur in meiosis except the one stating that sister chromatids separate during Meiosis I. The separation of sister chromatids actually happens in Meiosis II, not Meiosis I.
Explanation:The process of meiosis involves several stages, each with distinct events. The main function of meiosis is to produce haploid gametes from a diploid cell. Specifically, one diploid cell divides to produce four haploid cells. Furthermore, chromosomes separate from each other which is a crucial event during meiosis.
However, the statement 'During meiosis I, sister chromatids separate from one another during meiosis II' is incorrect. In fact, the separation of sister chromatids occurs during anaphase of meiosis II, not meiosis I. Hence, all of the described events happen in the process of meiosis, except for sister chromatids separating during meiosis I.
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Archaea frequently inhabit the guts of animals that consume foods rich in cellulose. These prokaryotes assist in the digestion of cellulose and release "marsh gas" as a waste product. Archaea in the same group live in anaerobic muck in wetlands. These archaea would be considered _____.
a.)methanogens
b.)extreme halophiles
c.)sulfur bacteria
d.)extreme thermophiles
Answer:
Methanogens
Explanation
Archaea is one of the three major domains of living organisms. It contains single celled organisms that lack membrane bound organelles hence they are prokaryotes.
Methanogens are archaea that frequently inhibit the guts of animals that consume foods rich in cellulose such as cows.They breakdown the cellulose releasing marsh gas as a waste product.
They also live in anaerobic muck in wetlands.
Which one of these biomes is known for: - high temperature - high precipitation - lots of biodiversity - high rate of primary productivity
Answer:
Option C
Explanation:
Options for the question are -
a) Grassland
b) Tundra
c) Tropical Rain forest
d) Temperate
Solution -
Tropical rainforest also known as tropical wet forest and have higher rate of primary productivity as compared to any other biome because of the following reasons-
a) It has high precipitation which makes it an ideal place for plant communities.
b) It has adequate annual temperature
c) It has a year round growing season which fuel the plants growth
All these factors are not present altogether in any on the biome due to which the productivity and diversity of tropical biome is higher
Hence, option C is correct
If a peptide was composed entirely of alpha-helical structure and found to contain an integer number of complete turns, which of the following would be a possible number of amino acid residues in the peptide?
A) 36
B) 60
C) 20
D) 32
Answer:
A
Explanation:
The possible number of amino acid residues in the peptide composed entirely of alpha-helical structure and found to contain an integer number of complete turns is 36
4. Describe the most likely direction of the prevailing winds across the Big Island of Hawaii.
The most likely direction of the prevailing winds across the Big Island of Hawaii is northeast.
Question you guys need to answer: 5) What is the basis for your answer to question 4 above?
The most likely direction of the prevailing winds across the Big Island of Hawaii is northeast.
Explanation:
The island of Hawaii, like all the other major Hawaiian Islands, is affected by the trade winds. These trade winds bring cool air to the islands from the north, often resulting in precipitation along inland/mountain and windward areas.
All of the Hawaiian Islands have both a windward and a leeward side. In general terms, the windward side is the wet, rainy, and therefore more lush, green, and tropical section. The windward side faces North or East, where it receives the benefit of the cool, trade-wind breeze.
Answer:
The island of Hawaii, like all the other major Hawaiian Islands, is affected by the trade winds. These trade winds bring cool air to the islands from the north, often resulting in precipitation along inland/mountain and windward areas.
Alonzo graduates with a 3.8 GPA in Accounting from a New York university and receives offers of employment from three of the Big Four accounting firms. While considering his options, a mid-sized firm in California calls and offers him twice the starting salary of his top offer. The only caveat is he needs to show up at the Los Angeles office within the next week to start work immediately. Alonzo excitedly decides to take the California job. He refuses the other employment offers, breaks his lease in New York, sells or gives away most of his possessions, buys a new car, and heads for L.A. the next day. When he arrives at the Los Angeles office three days later, the firm apologizes and informs Alonzo that the position is no longer available due to the loss of a major client.
Answer:
Yes
Explanation:
Remaining part of the question
Based on these facts, does alonzo have a potential claim against the accounting firm?
Solution
As per the theory of Promissory estoppel a promise made by an employer or entity to an individual/entity or any other subject even without any formal consideration cannot breach the promise on any basis including the any incident causing sudden crisis in organization.
The same happened with Alonzo and hence he can claim against his employer on the basis of Promissory estoppel theory.
The scenario is about law, specifically contract law and the concept of promissory estoppel. Alonzo took significant action based on a job offer that was later withdrawn, and thus may have a valid claim for compensation.
Explanation:The situation Alonzo faces can be categorized under contract law. In this particular case, it seems that Alonzo might have a valid claim for promissory estoppel, a legal principle that stops a party from going back on a promise that led another party to act on that promise, suffering damages as a result.
Here, the California firm made a promise to Alonzo (employment), which he relied on to make significant life changes. The California firm did not follow through on their promise, resulting in damages for Alonzo (relocation expenses, lost opportunities). If Alonzo can prove these points in a court of law, he may be able to successfully claim compensation for his losses.
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The ecological perspective emphasizes the dynamic interactions between people and their environment. Gitterman (2014) explains that many of the problems faced by people " are outcomes of complex ecological chains that include attributes of the individual's ___________, ___________, ___________, ___________ and ___________ ___________.
Answer:
Psychology, social, communal, physical, economic and political
Explanation:
Gitterman (2014) explains that many of the problems faced by people " are outcomes of complex ecological chains that include attributes of the individual's, psychology, social, communal, physical, economic and political behaviours.
Answer:
The correct answer is "genetic, biophychosocial makeup, recreational resources general culture and subculture, social class and the overall polity"
Explanation:
According to the book of Alex Gitterman and Carel B. Germain "The Life Model of Social Work Practice. Advances in Theory and Practice", many problems that people face respect to ecology are determined by "attributes of the individual's genetic, biophychosocial makeup, recreational resources general culture and subculture, social class and the overall polity". In this book the authors explain how social pathologies are developed respect to the individual attributes and the ecological perspective of these pathologies.
An online article that your professor asked you to critique states that African Americans cannot contract malaria, even if they go to endemic areas, because of a genetic trait that confers protection from the disease. Why is this article incorrect?
A. African Americans have lost the allele for normal red blood cells through genetic drift from their ancestral African population.
B. balanced polymorphism means that not all African Americans are heterozygous for the sickle cell trait.
C. protection from malaria cannot be conferred by genes.
D. African Americans are more likely to have thalassemia, which does not protect a person completely from contracting malaria.
Answer:
The answer is B.
Explanation:
Regarding the situation explained in the question that "African Americans are not affected by the malaria disease because of a specific genetic trait that they possess and that trait provides them with protection" can be explained by the answer given in option B.
Being heterozygous, meaning possessing a dominant and a recessive allele regarding that genetic trait, in terms of sickle cell trait which is a gene that causes the individual's blood cells to be sickle shaped and balanced polymorphism which means carrying two different versions of a gene is an argument that is enough to prove that the above statement is incorrect because it means they have blood cells that can be affected by the malaria disease.
I hope this answer helps.
Researchers believe that the size difference between male and female brains results from the influence of: a. gender identity. b. progesterone. c. testosterone and estrogen. d. Wolffian inhibiting hormone.
Answer:
Researchers believe that the size difference between male and female brains results from the influence of:
gender identity
Explanation:
individual difference would only allow such as no published journals by researcher to affirm the obvious difference in the brain size of male and female
In the plant kingdom, all the different species are descended from a single common ancestor. What is the correct term that describes this type of lineage?
Answer:
yes
Explanation:
lol, lol