History of Life

History of Life

Much of what we know about the history of life on Earth is based on the fossil record. Molecular clocks are used to estimate how long it has been since two species diverged from a common ancestor.

CK-12 (High School)

ESSENTIAL QUESTION:

STANDARDS:
RST.2 - Main Ideas, RST.1 - Analysis & Evidence, RST.4 - Key Terms

DEPTH OF KNOWLEDGE (DOK) LEVELS:

2,1
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