as you read

You'll Learn

■ Define biodiversity.

■ Explain why biodiversity is important in an ecosystem.

■ Identify factors that limit biodiversity in an ecosystem.

It's Important

Knowledge of biological diversity can lead to strategies for preventing the loss of species.

Q Review Vocabulary mammal: endothermic vertebrate with mammary glands and hair growing from their skin

New Vocabulary

• biodiversity

• extinct species

• endangered species

• threatened species

• introduced species

• native species

• ozone depletion

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