Evolution by Natural Selection

Front

What is evolution?

Back

Change over time in a population.

Front

What is natural selection?

Back

The process by which organisms with advantageous traits are more likely to survive and reproduce.

Front

What is an inherited trait?

Back

A characteristic that is passed from parents to offspring through genes.

Front

What is an adaptation?

Back

A trait that helps an organism survive in its environment.

Front

Why are advantageous traits more likely to be passed onto offspring?

Back

Because they are more likely to survive and reproduce.

Front

What does the theory of evolution by natural selection explain?

Back

It explains how the inherited traits of a population change over time.

Front

What is a mutation?

Back

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

Front

What is the difference between dominant and recessive alleles?

Back

Dominant alleles express their traits even if only one copy is present, while recessive alleles require two copies to express their traits.

Front

What is genetic variation?

Back

Differences in DNA among individuals in a population.

Front

What role does competition play in natural selection?

Back

Organisms compete for limited resources, and those with advantageous traits are more likely to survive.