1. Determine which of the following is/are examples of disruptive selection:

a) In the jungle when there is a flooding researchers find that the lizards with the longest and shortest legs in the population have the highest survival.

b)On white sand beaches researchers find that mice with light colored fur have higher survival than mice with dark colored fur.

c)Researchers find that male parrots with the bluest tail feathers attract the most female mates.

d)Researchers find that chimpanzee babies of intermediate weight have higher survival than lighter or heavier babies.

e) A and D

2. which of the following describes balancing selection:

a) When multiple different phenotypes are favored or maintained in a population.

b)When the extreme phenotypes in a population are disfavored.

c) When the average (mean) phenotype of a population moves in one direction.

d)When the extreme phenotypes in a population are favored.

3.Which of the following is/are ways that phenotypic variation can be increased or maintained in a population?

a)frequency dependent selection

b)Heterozygote advantage

c)selection that fluctuates over time

d)selection that fluctuates over space

e) A, B, C, and D

f)All of the above.

4.There is a population of birds in which females who lay an intermediate number of eggs have the highest reproductive success. This is because if the mother lays too many eggs then all of her offspring starve, and if she lays too few eggs she is below the number she could have laid successfully. What type of natural selection is this?

a) Directional selection

b) Stabilizing selection

c) Balancing selection

d) Disruptive selection

e) A and C

5. Match the following terms with the descriptions provided.

__a)Sexual dimorphism A)Limited by the ability to find adequate resources for young.

__b)Sexual Selection B)All mature male moose have large antlers.

__c)Female Fitness C)Some male zebra finches have more orange in their beaks than others.

__d)Male Fitness D)Limited by attractiveness to mate.