11. Human being belongs to the species of_____.
12. Links between organisms that show branching pattern of evolutionary relationships are shown by_____.
A. living fossils
B. comparative embryology
C. phylogenetic trees
D. two fossil layers
Answer : Option C
13. Speciation is the evolutionary process by which _____.
A. a new gene pool is formed
B. evolutionary paths of species converge
C. hybrid species formed
D. Shows up differences in physical traits
Answer : Option A
14. Evidences of evolutionary relationships is found in ______.
15. Which of the following is not a source of variation in a population?
A. Inherited genetic differences.
B. Differences due to health.
C. Differences due to age.
D. None of the above.
Answer : Option D
16. Which of the following examples of variation is not important from an evolutionary standpoint?
A. Genetic differences between individual organisms comprising the population.
B. Inherited differences between individual organisms comprising the population.
C. Differences due to diet, health, age or accident that have no affect on an individual's ability to survive and reproduce.
D. A and B.
Answer : Option C
17. Why is genetic variation important from an evolutionary standpoint?
A. If all organisms were the same, the entire population would be vulnerable to particular pathogens, like viruses.
B. All evolutionary adaptations (e.g. the origin of forelimbs) are the result of the gradual build up of genetic differences between organisms over geologic time.
C. Evolution (at the population level) refers to changes in the frequencies of genes in the population over time.
D. All of the above.
Answer : Option D
18. Which of the following is an example of genetic variation?
A. Two children have different eye colors.
B. One person is older than another.
C. One person has a scar, but her friend does not.
D. Tod eats meat, but his brother Rod is a vegetarian.
Answer : Option A
19. Which of the following is an example of environmental variation?
A. Apu is a tongue roller, but his brother Sanjay is not.
B. Marge dyes her hair blue.
C. Homer inherited baldness from his father's side of the family.
D. Patti and Selma have hanging ear lobes.
Answer : Option B
20. What's the difference between natural selection and sexual selection?
A. Sexual selection occurs during sex.
B. Natural selection is a type of sexual selection.
C. Sexual selection is a type of natural selection.
D. Sexual selection occurs within demes, natural selection does not.
Answer : Option C