Answers Biology A The Living Earth A Unit Test — Unit testQuestion 16

16

QuizMultiple Choice

Unit Test — Unit test

Question 16 • Biology A (The Living Earth A)

Which best describes eras and periods?

Answer

A

Eras have a smaller time span than periods.

B

Eras and periods are independent of each other.

C

Eras and periods both appear at the start of the Cambrian period.

D

Eras were more recently established on the time scale than periods.

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Which best describes eras and periods?