Use with pp. 7–9 Lesson 1: Where on Earth do organisms live?

Lesson 1 Checkpoint 1. What is the biosphere? 2. Why haven’t scientists identified all species that live today or lived in the past? 3. What is a species? What are some ways members of a species differ? Lesson 1 Checkpoint Use with pp. 7–9 Quick Study Chapter 1, Lesson 1 Checkpoint 3 ................
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