Natural Selection

Front

What would we call the dog-like creature from which whales and dolphins descended?

Back

A common ancestor

Front

What do we call this "family tree"?

Back

Evolution

Front

What is an inherited trait?

Back

A characteristic determined by an organism's genes

Front

When is a trait most likely to be passed on to the next generation? Options: When it serves no purpose, When it becomes an advantage to the organism's survival, When it gives the organism a lot of water, When it prevents the organism from finding a mate.

Back

When it becomes an advantage to the organism's survival

Front

In the phrase "survival of the fittest," the term "fittest" refers to:

• The best-adapted organisms
• The biggest organisms
• The smartest organisms
• The fastest organisms

Back

The best-adapted organisms

Front

When nature "selects" a variation, that means that the trait:

• Gets passed along from generation to generation
• Causes the population to shrink
• Has brought about a new species
• Helps prey escape predators

Back

Gets passed along from generation to generation

Front

Where the better adapted organisms survive to pass traits along to offspring.

Back

Natural Selection

Front

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

Back

Because they are more likely to survive and reproduce.

Front

What word describes a trait that helps an organism survive in its environment?

Back

adaptation

Front

Mutations are a change in what? Options: DNA, tRNA, protein, rRNA

Back

DNA