Unit 8 The Theory of Evolution

Front

What happens if a species is unable to evolve?

Back

They would become extinct.

Front

What is a term for a group of similar organisms that can mate and reproduce fertile offspring?

Back

Species.

Front

What can cause extinction?

Back

All can be causes of extinction: increased competition, new predators, loss of habitat, and catastrophes.

Front

Why are mutations important?

Back

They bring about genetic variation needed for a population to evolve.

Front

What does 'survival of the fittest' mean?

Back

It refers to an organism's ability to survive and reproduce fertile offspring.

Front

What is evolution?

Back

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

Front

What is natural selection?

Back

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

Front

What is genetic variation?

Back

Differences in DNA among individuals within a population.

Front

What is a mutation?

Back

A change in the DNA sequence that can lead to new traits.

Front

What is a species' niche?

Back

The role or function of an organism or species within an ecosystem.