Explain why comparing biodiversity in the United States to biodiversity elsewhere in the world can be based on estimates only.

The only biodiversity hot spot in the U.S. is California, therefore the U.S. doesn't have a lot of biodiversity compared to the rest of the world. 1. Describe 4 types of efforts to save individual species. ... Explain the advantages of protecting entire ecosystems rather than individual species.

Explanation:

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