LS.11a Natural Selection & Adaptations

If a species cannot adapt, it might become extinct.

• True

• False

All mutations are harmful.

• True

• False

Which of the following can cause a mutation?

• Exercise

• Eating food

• Radiation or chemicals

• Breathing

What is natural selection?

• The way animals pick their food

• When humans choose traits in animals

• When organisms with helpful traits survive and reproduce more

• A random change in DNA

Which best describes an adaptation?

• A learned behavior

• A change in an organism that helps it survive and reproduce

• A type of food

• Something that always makes an organism slower

Only mutations in sex cells can be inherited.

• True

• False

An adaptation always makes an animal bigger.

• True

• False

What is a possible result of a mutation?

• No change at all

• A helpful trait

• A harmful trait

• All of the above

Natural selection happens over many generations.

• True

• False

A mutation in a body cell will:

• Be passed on to offspring

• Not affect the organism

• Not be passed on to offspring

• Turn into an adaptation