16.3 Evolution by Natural Selection

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Last Name

What does the phrase struggle for existence mean?

Why is camouflage considered an adaptation?

How does an animal’s level of fitness relate to its chances of survival and reproduction?

Natural selection acts on acquired traits.

• True
• False

Any inherited characteristic that increases an organism’s chance of survival is considered an adaptation.

• True
• False

Natural selection is the ability of an individual to survive and reproduce in its specific environment.

• True
• False

Natural selection depends on the ability of organisms to ____________, which means to leave descendants.

Every organism alive today ________________ from ancestors who survived and reproduced.