Which of the following is an example of the founder effect?

Someone steps on some bugs and randomly removes their alleles from the population. This is an example of

A drastic reduction in the size of a population that can change allele frequencies is called

The Amish have a higher frequency of polydactyly (extra fingers) in their community than the general population. This is due to the allele for extra fingers being present in the group that started the Amish community.

If a population of lizards is isolated on an island, with no new immigrants over many years, any new genetic variations are most likely to come from

Small populations are more prone to genetic drift than large populations.

The movement of alleles from one population to another is called

Select ALL of the following that violate the Hardy-Weinberg assumptions and would lead to a change in allele frequencies in a population.

When allele frequencies remain constant, a population is evolving.

A forest fire ignites in the Sam Houston State Forest and kills many members of a population of pigmy rattlesnakes.

Select the best answer based on the image.

Genetic diversity is decreased through this process.

Select the best answer based on the image.

Select the best answer based on the image.

A population of flowers on one side of a river transports pollen to flowers on the other side of the river

Mutations are important because they bring about

Label the natural selection graphs correctly...

Starlings produce an average of five eggs. If there are more than five the parents cannot adequately feed the young. Fewer than five and predators may destroy them. As a result, five eggs becomes the most common number.

Seed cracker birds have either large beaks or small beaks. They do not have medium sized beaks because medium sized beaks do not allow for adequate cracking of seeds.

A scientist measures the circumference of acorns in a population of oak trees and discovers that the most common circumference is 2 cm. There are very few acorns with circumferences of 3 cm or circumferences of 1 cm. Only the 2 cm circumference acorns survive.

A population of Madagascar hissing cockroaches lives in a woodpile. The cockroaches are eaten by lizards. Because the lizards have small heads, the lizards are unable to eat the very largest adult cockroaches, and instead prey upon small and medium sized adults. Over time, only the large headed lizards survive.

A population of birds with various size beaks eats seeds. Small seeds can be eaten by birds with small beaks. Larger, thicker seeds can only be eaten by birds with larger, thicker beaks. During a drought, only large thick seeds exist so only the large, thick-beaked birds survive.

Black rabbits (BB) and white rabbits (bb) are both able to survive because they can camouflage into the white and black rocks in their environment. However, the intermediate gray rabbits (Bb) do not survive. This results in only white and black rabbits.