Unit 5: Evolution Review

After which event could you say evolution has occurred?

• A new predator enters the environment

• A species of trees dies out

• A yellow butterfly is born into a population of blue butterflies

• Allele frequency changes in a population

Which group of organisms is considered a population?

• freshwater salmon

• all the deer in North America

• all the birds living in the rain forest

• a flock of sheep living on the same farm

What are vestigial structures?

• Structures in different species that are similar enough to suggest the species had a common ancestor

• Similar patterns of early embryonic development

• Structures that appear to have no function for the organism but probably had a function in an ancestral organism

• Similarities in the protein (DNA) of different organisms

What process involves the environment acting on individuals so that those with favorable traits survive and reproduce?

• Evolution

• Natural Selection

• Genetic Drift

• Gene Flow

Natural selection acts on variations in populations through a specific trait. Which is true?

• All forms of the trait have the same impact on survival

• The trait is resistant to mutations

• The trait is passed on to the next generation

• The trait is the same for all organisms

Fossils are able to provide exact dates that organisms lived in the past.

• True

• False

Which word means "traits that help a living thing to survive"?

• adaptation

• fitness

• over-reproduction

• variations

Which word means "differences within a species"?

• variation

• adaptation

• offspring

• competition

What word means "an organism's ability to survive and reproduce"?

• fitness

• adaptation

• variation

• offspring

What word means "change over time"?

• evolution

• natural selection

• adaptation

• survival