Unit 7 Evolution Test Review

Front

What must a species be able to do in order to survive?

Back

Reproduce successfully.

Front

What is variation in the context of evolution?

Back

Variation refers to the differences in traits among individuals in a population.

Front

What is a bottleneck effect in evolution?

Back

A bottleneck effect occurs when a population's size is significantly reduced, leading to a loss of genetic diversity.

Front

What evidence best supports the hypothesis that two species are related?

Back

Presence of homologous structures and similar DNA.

Front

What is one of the key statements of Darwin’s theory of evolution by natural selection?

Back

More offspring are produced than can possibly survive.

Front

Define homologous structures.

Back

Homologous structures are body parts in different species that share a common ancestry, even if they have different functions.

Front

What is the significance of DNA studies in understanding evolution?

Back

DNA studies help identify genetic similarities and differences between species, providing evidence for evolutionary relationships.

Front

What is gene flow?

Back

Gene flow is the transfer of genetic material between populations, which can affect genetic diversity.

Front

What are vestigial structures?

Back

Vestigial structures are body parts that have lost their original function through evolution.

Front

Explain the concept of natural selection.

Back

Natural selection is the process where organisms better adapted to their environment tend to survive and produce more offspring.