Understanding Natural Selection

Why do different animals thrive in different environments?

• Due to identical genetic codes.

• Because they all live in the same habitat.

• Due to varying environmental pressures.

• Because they all have the same traits.

What happens when bacteria reproduce?

• They merge with other bacteria.

• They split into two identical cells.

• They change their genetic code completely.

• They stop reproducing.

How do mutations affect genetic variation?

• Some mutations can be advantageous.

• Mutations never occur in nature.

• Mutations always harm the organism.

• All mutations are beneficial.

What advantage does penicillin provide to mold?

• It makes mold spores less effective.

• It allows mold to grow slower.

• It reduces the mold's food supply.

• It kills competing molds.

Which of the following is an example of natural selection?

• Animals choosing their traits.

• Camouflage in animals.

• All animals having the same fur color.

• Animals not adapting to their environment.