Homework Answers
First option
First option is incorrect because natural selection is a non random process all the variations caused due to this process are random in nature.
Second option is correct because natural selection helps an organism to adapt better in its environment. It occurs only because of the reason that some traits are beneficial in some environment where as some other traits are beneficial in different type of environment.
Third option is correct because natural selection is a very powerful force for causing evolution.
Fourth option is also correct because it may take hundreds of generation to change the frequency of an allele by natural selection.
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Which of the following statements regarding natural selection is not true? It is a random process....
6. Which of these conditions will lead to evolution by natural selection? a. Heavy metal pollution...
6. Which of these conditions will lead to evolution by natural selection? a. Heavy metal pollution reduces reproductive success of all phenotypes of green algae in the pond. b. Variation among individuals is not genetic; instead it results from learned behavior or physiological environmental responses. c. Introduction of an exotic predator species results in one native prey phenotype evading predation while other phenotypes get eaten. d. Individuals of the population are clones (genetically identical). 7. Which one is used as...
False Question 10 1 pts Choose the statement or statements that are CORRECT about natural selection...
False Question 10 1 pts Choose the statement or statements that are CORRECT about natural selection and evolution According to Darwin's hypothesis, natural selection is the primary mechanism for evolution the theory of evolution includes the idea that all living organisms share a common ancestor organisms that are closely related will have similar DNA and protein sequences natural selection is a random process natural selection will increase the prevalence of gene that improve fitness 1 pts Question 11
heterozygote disadvantage Natural selection is the process by which organisms with the best adapted phenotype are...
heterozygote disadvantage Natural selection is the process by which organisms with the best adapted phenotype are selected for by environmental conditions. anthropogenic events such as the use of DDT heterozygote advantage Allelic frequencies can change due to selection or they may change due to genetic drift. environmental conditions The process of natural selection relies on the presence of of a gene within a population. genetic drift Deleterious alleles may persist in the population particularly if they confer a single allele...
10. Indicate whether the following questions are true or false. Evolution is a change in allele...
10. Indicate whether the following questions are true or false. Evolution is a change in allele or genotype frequency over time True False Evolution always results in a visible change in the physical characteristics of an organism True False Evolution is a process that takes place over many generations True False Evolution is only seen in unicellular organisms. True False Evolution is a natural phenomenon that is outside the influence of humans. True False
a. Why is heritability necessary for natural selection? How would you expect a trait for which...
a. Why is heritability necessary for natural selection? How would you expect a trait for which there is no resemblance between parents and offspring to change over time? b. Why is differential success among organisms with different variants of a trait necessary for natural selection? How would you expect a trait for which there is no differential success to change over time?
1. Which of the following is/are required for natural selection to occur? A. The trait must...
1. Which of the following is/are required for natural selection to occur? A. The trait must be used or it will no longer be passed down B. Trait must be inherited from the father, not mother C. The species could produce more offspring than their environment can support D. Members of the population must have inherited traits that could vary E. Members must have an equal ability to survive and reproduce 2. Which of the following statements is/are true? A....
help 4.) Darwin's Theory of Natural Selection stated that: a.) At one time the earth held...
help
4.) Darwin's Theory of Natural Selection stated that: a.) At one time the earth held all the species and each catastrophic event would destroy certain species - survivors would repopulate the world b.) Environmental pressures and internal needs bring about changes in body form and function and this is passed on to their offspring c.) Process in which individuals with favorable inherited traits are more likely to survive and reproduce at a higher rate than other individuals 5.) Convergent...
Which of the following statements regarding the Hardy-Weinberg Equation is TRUE? Answers: It can only be u...
Which of the following statements regarding the Hardy-Weinberg Equation is TRUE? Answers: It can only be used when allele and genotype frequencies remain constant across generations in a population It can only be used when allele and genotype frequencies change across generations in a population It has no assumptions It mathematically shows how recessive alleles in a population decrease over time It reveals when allele frequencies change over time in a population Assuming Hardy-Weinberg Equilibrium, what percentage of individuals in...
Natural selection can move a population beyond its initial range of variation because a. sudden increases...
Natural selection can move a population beyond its initial range of variation because a. sudden increases in mutation rates are often induced by selection. b. under genetic drift there is less variation and under selection there is more. c. selection can expose hidden variation. d. selection usually increases the randomness of mating, thus increasing variation. Which of the following is true of continuously varying characters? a. They allow for blending of the effects of two genes, the blended version passed...
Q 11. Which of the following statements is TRUE about Sickle cell anemia? (A) It is...
Q 11. Which of the following statements is TRUE about Sickle cell anemia? (A) It is caused by a genetic mutation in the beta-hemoglobin gene. (B) It confers heterozygote advantage against malaria (C) It results in abnormal, sickle-shaped erythrocytes. (D) All of the above. Q 12. Which of the following explains why a deleterious allele may persist in a population? (A) Random genetic drift (B) Balancing selection (C) Negative selection (D) Random genetic drift or balancing selection Q 13. Which...
6. Which of these conditions will lead to evolution by natural selection? a. Heavy metal pollution reduces reproductive success of all phenotypes of green algae in the pond. b. Variation among individuals is not genetic; instead it results from learned behavior or physiological environmental responses. c. Introduction of an exotic predator species results in one native prey phenotype evading predation while other phenotypes get eaten. d. Individuals of the population are clones (genetically identical). 7. Which one is used as...
False Question 10 1 pts Choose the statement or statements that are CORRECT about natural selection and evolution According to Darwin's hypothesis, natural selection is the primary mechanism for evolution the theory of evolution includes the idea that all living organisms share a common ancestor organisms that are closely related will have similar DNA and protein sequences natural selection is a random process natural selection will increase the prevalence of gene that improve fitness 1 pts Question 11
heterozygote disadvantage Natural selection is the process by which organisms with the best adapted phenotype are selected for by environmental conditions. anthropogenic events such as the use of DDT heterozygote advantage Allelic frequencies can change due to selection or they may change due to genetic drift. environmental conditions The process of natural selection relies on the presence of of a gene within a population. genetic drift Deleterious alleles may persist in the population particularly if they confer a single allele...
10. Indicate whether the following questions are true or false. Evolution is a change in allele or genotype frequency over time True False Evolution always results in a visible change in the physical characteristics of an organism True False Evolution is a process that takes place over many generations True False Evolution is only seen in unicellular organisms. True False Evolution is a natural phenomenon that is outside the influence of humans. True False
help
4.) Darwin's Theory of Natural Selection stated that: a.) At one time the earth held all the species and each catastrophic event would destroy certain species - survivors would repopulate the world b.) Environmental pressures and internal needs bring about changes in body form and function and this is passed on to their offspring c.) Process in which individuals with favorable inherited traits are more likely to survive and reproduce at a higher rate than other individuals 5.) Convergent...
Q 11. Which of the following statements is TRUE about Sickle cell anemia? (A) It is caused by a genetic mutation in the beta-hemoglobin gene. (B) It confers heterozygote advantage against malaria (C) It results in abnormal, sickle-shaped erythrocytes. (D) All of the above. Q 12. Which of the following explains why a deleterious allele may persist in a population? (A) Random genetic drift (B) Balancing selection (C) Negative selection (D) Random genetic drift or balancing selection Q 13. Which...
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