Homework Answers
Ans.(A) Natural selection
Explanation
Allel frequency in population may change due to four fundamental forces of evolution. Natural selection, genetic drift, mutation and gene flow.
Mutations are ultimate source of new alleles in gene pool.
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Which of the following are evolutionary forces that account for change in the genetic composition of...
are these correct Stopping which of these evolutionary forces can lead to speciation? A. genetic drift...
are these correct
Stopping which of these evolutionary forces can lead to speciation? A. genetic drift OB. gene flow OC. natural selection OD. sexual selection O E. mutations QUESTION 2 Speciation is most commonly a result of A. copatry OB. antipatry OC. allopatry OD. sympatry O E. sexual selection
Select the option that contains three evolutionary forces a) natural selection, genetic drift, gene flow b)...
Select the option that contains three evolutionary forces a) natural selection, genetic drift, gene flow b) somatic cells, chromosomes, natural selection c) non-random mating, genomes, variation d) proteins, genetic drift, alleles e) natural selection, DDT resistance, environment
13. Which of the following is the only evolutionary process that consistently produces adaptation? a. Genetic...
13. Which of the following is the only evolutionary process that consistently produces adaptation? a. Genetic drift b. Natural selection c. Gene flow d. Mutations 14. Which of the following is NOT a possible result when isolated populations come into contact? a. Dispersal b. Stability c. Reinforcement d. Fusion e. New Species 15. What is greater than mutations in producing variation in diploids? a, transformation b. sexual recombination c. natural selection d. punctuated equilibrium e. conjugation 16. Which type of...
Genetic drift can be an important evolutionary process. This is due to the fact that (A...
Genetic drift can be an important evolutionary process. This is due to the fact that (A natural selection acting on the genetic variation of a large population B small isolated populations are unable to defend themselves from predators, therefore they loos genetic diversity. Natural selection, in this case, has less variation to work with. C when genetic drift is the only evolutionary process at work, one allele may be lost forever and the other may become fixed (100% frequency). D)...
Of the following evolutionary forces; crossing over, directional selection, mutation, speciation, stabilizing selection, sex, gene flow...
Of the following evolutionary forces; crossing over, directional selection, mutation, speciation, stabilizing selection, sex, gene flow and genetic drift which promote or maintain genetic variation within a population? a) crossing over only b) directional selection and sex c) directional selection, mutation, and speciation d) crossing over, mutation, sex, and gene flow e) only sex Of the following evolutionary forces, crossing over, directional selection, mutation, speciation, stabilizing selection, sex, gene flow and genetic drift which promote genetic differentiation (divergence) among populations?...
Which of the following statements about genetic drift as an evolutionary factor is true? a. It...
Which of the following statements about genetic drift as an evolutionary factor is true? a. It is more potent in a population with small numbers than in a population with large numbers. b. It is responsible for the selection of mutations. c. It is connected to the movements of alleles between populations of a single species. d. Its strength is proportional to the size of a population: the larger the population, the greater the force. e. Both a and b
c) allotype 7. The genetic composition (makeup) of an organism is called the: a) phenotype b)...
c) allotype 7. The genetic composition (makeup) of an organism is called the: a) phenotype b) genotype 8. Which of the following is a polar covalent bond: a) C-H b) O-H c) O-O d) none of d) idiotype c) allotype d) idiotype these 9. Which of the following is a nonpolar covalent bond: a) N-C b) O-H c) C-H d) none 10. Natural selection requires : a) a stable hereditary mechanism b) a mechanism(s) to insure random variation of heritable...
Question 6 1 pts In light of the previous question, how can we explain the fact...
Question 6 1 pts In light of the previous question, how can we explain the fact that the Hawaiian bobtail squid has clearly evolved to precisely control the association with its bacterial symbiont, whereas the bacterium shows no signs of adapting to the same symbiosis? (Why does the animal host appear to be 'winning the evolutionary race to control their interaction?) squid have remarkably high mutation rates It is actually best for the bacterium to simply let the squid evolve...
1. Which of the following mutations could create a frameshift and change the sequence of a...
1. Which of the following mutations could create a frameshift and change the sequence of a protein? 1. A back mutation 2. Deletion of a base 3. Insertion of a base 4. A base substitution of C for A I 2. Which of the following is NOT common to ALL forms of speciation? Select one: a. Formation of a new species b. None, all of these are common to all forms of speciation c. Ecological isolation d. Limited gene flow...
Which of the following does not change allele frequencies in a population? A. genetic drift B....
Which of the following does not change allele frequencies in a population? A. genetic drift B. mutation C. migration D. nonrandom mating E. natural selection
are these correct
Stopping which of these evolutionary forces can lead to speciation? A. genetic drift OB. gene flow OC. natural selection OD. sexual selection O E. mutations QUESTION 2 Speciation is most commonly a result of A. copatry OB. antipatry OC. allopatry OD. sympatry O E. sexual selection
13. Which of the following is the only evolutionary process that consistently produces adaptation? a. Genetic drift b. Natural selection c. Gene flow d. Mutations 14. Which of the following is NOT a possible result when isolated populations come into contact? a. Dispersal b. Stability c. Reinforcement d. Fusion e. New Species 15. What is greater than mutations in producing variation in diploids? a, transformation b. sexual recombination c. natural selection d. punctuated equilibrium e. conjugation 16. Which type of...
Genetic drift can be an important evolutionary process. This is due to the fact that (A natural selection acting on the genetic variation of a large population B small isolated populations are unable to defend themselves from predators, therefore they loos genetic diversity. Natural selection, in this case, has less variation to work with. C when genetic drift is the only evolutionary process at work, one allele may be lost forever and the other may become fixed (100% frequency). D)...
c) allotype 7. The genetic composition (makeup) of an organism is called the: a) phenotype b) genotype 8. Which of the following is a polar covalent bond: a) C-H b) O-H c) O-O d) none of d) idiotype c) allotype d) idiotype these 9. Which of the following is a nonpolar covalent bond: a) N-C b) O-H c) C-H d) none 10. Natural selection requires : a) a stable hereditary mechanism b) a mechanism(s) to insure random variation of heritable...
Question 6 1 pts In light of the previous question, how can we explain the fact that the Hawaiian bobtail squid has clearly evolved to precisely control the association with its bacterial symbiont, whereas the bacterium shows no signs of adapting to the same symbiosis? (Why does the animal host appear to be 'winning the evolutionary race to control their interaction?) squid have remarkably high mutation rates It is actually best for the bacterium to simply let the squid evolve...
1. Which of the following mutations could create a frameshift and change the sequence of a protein? 1. A back mutation 2. Deletion of a base 3. Insertion of a base 4. A base substitution of C for A I 2. Which of the following is NOT common to ALL forms of speciation? Select one: a. Formation of a new species b. None, all of these are common to all forms of speciation c. Ecological isolation d. Limited gene flow...
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