One way for disruptive selection to occur is ifa. the population contains diversity.b. the environment contains diversity.c. pollution is present.d. natural selection occurs.e. All of these are correct.

Genetic drift and natural selection can both result in rapid evolution. However, O A. natural selection requires genetic drift to provide new variation in populations. O B. genetic drift works slowly in small populations. O C, only drift leads to adaptation. O D. both processes of evolution could be slowed by gene flow.

A population occupies heterogeneous environments in which the fitness of some genotypes is higher in one environment and the fitness of other individuals is higher in another environment. This situation is likely to result in a. directional selection. b. stabilizing selection. c. disruptive selection. d. balancing selection.

Which of the following types of selection maintain variation in a population?   a. Overdominance (Heterozygote advantage)   b. Underdominance (Heterozygote disadvantage)   c. Frequency-dependent selection   d. Directional selection   e. Both a. & b.    f. Both a. and c.    g. Both a. and d.

Which of the following is true regarding vestigial traits?   A. Vestigial traits are evidence for change over time   B. Vestigial traits are evidence for common ancestry   C. Vestigial traits indicate that not evolution does not perfect organisms   A and B   A, B, and C

Which of the following is NOT a correct statement regarding the neutral-mutation explanation for the high levels of genetic variation? A. Most genetic variation observed is adaptively neutral. B. Natural selection plays a lesser role in maintaining genetic variation. C. When natural selection occurs it leads to a decrease in genetic variation. D. Genetic variation is maintained mainly via the random effects of genetic drift.

A set of alleles carried by (characteristics of) an organism that encodes for a specific trait. Select one: O a. Genetic diversity b. Karyotype c. Phenotype d. Genotype e. Natural selection

A gene exists in two alleles, and the heterozygote has the highest fitness. This situation is likely to result in a. directional selection. c. disruptive selection. b. stabilizing selection. d. balancing selection.

Which of the following statements most accurately describes the effects of genetic drift on a population?   a. Populations of the same size will follow the same evolutionary trajectory when evolving due to drift.   b. Genetic drift has the potential to drive evolution in all populations.   c. Allele frequencies in a population of infinite size will ultimately drift to fixation or loss.   d. The loss of otters in California due to excessive hunting cause a founder effect.

If hybrids are less successful than individuals of either parent species which of the following is most likely to occur? Group of answer choices A. fusion B. mutation C. reinforcement D. frequency dependent selection