22) Evidence suggests that complex multicellular, water-dwelling organisms first appeared on earth
A) in the early 1920s.
B) 600 million years ago.
C) 10 million years ago.
D) 4 million years ago.
E) 2 million years ago.
Answer: B
Diff: 2 Page Ref: 27
Topic: 2.2 Human Evolution
Type: (Factual)
Rationale: This has the appearance of a very specific question, but the student requires only a general
concept of the timing to answer correctly.
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