Evolution

Individuals undergo evolution.

• True

• False

A phenotype that improves an organism’s chance of survival in their environment is considered a(n) ____________.

• natural selection

• adaption

• speciation

Which of the following is NOT an example of natural selection?

• People selectively breeding hamsters for size.

• Insect populations developing resistance to certain pesticides.

• Bacteria becoming resistant to antibiotics.

• Male birds of certain species inheriting colorful feathers that are more attractive to females.

Genetic drift is change in the allele frequency of a population due to...

• random chance
• natural selection
• non-random mating (sexual selection)
• artificial selection

Eyes that can see in the dark is a(an) _______ inherited by nocturnal animals.

• adaptation

• acquired trait

• learned ability

How does a species change over time?

• by adapting to the environment

• changes in the gene frequencies in a population

• acquiring new traits

• they do not change

The pelvic bone of whales is not needed for movement within the water. This is an example of a(n) ______________ structure.

• vestigial

• analogous

• homologous

The forelimbs of mammals have similar anatomy because these groups descended from a recent common ancestor. Their bone structure is an example of a(n) ______________ structure.

• vestigial

• analogous

• homologous

Many different groups of organisms have wings, even though they do not share a recent common ancestor. This is because they evolved in environments with similar selective pressures. Wings are an example of a(n) ______________ structure.

• vestigial

• analogous

• homologous

A flood drowns a large portion of an insect population, with only a few random individuals surviving. This is an example of ______.

• genetic drift

• adaptation

• natural selection