Evolution Test Review

Front

What does it mean if two organisms have similar traits of DNA?

Back

They probably share a common ancestor.

Front

What can be inferred about two organisms that are closely related?

Back

They would have very similar DNA sequences.

Front

What is the term for the white feathers of a snowy owl that allow it to blend in with its environment?

Back

Adaptation.

Front

What mechanism of evolution occurs when populations migrate?

Back

Gene flow.

Front

Which layer of sediment is typically the oldest in a geological context?

Back

Layer 4.

Front

What is evolution?

Back

The process by which different kinds of living organisms develop and diversify from earlier forms during the history of the earth.

Front

What is natural selection?

Back

The process where organisms better adapted to their environment tend to survive and produce more offspring.

Front

Define genetic drift.

Back

A mechanism of evolution that refers to random changes in the frequency of alleles in a population.

Front

What is speciation?

Back

The formation of new and distinct species in the course of evolution.

Front

What is the significance of fossils in understanding evolution?

Back

Fossils provide evidence of past life forms and show how species have changed over time.