Homo Sapiens and Our Direct Ancestors Have Been Abundant on Our

question 7

Multiple Choice

Homo sapiens and our direct ancestors have been abundant on our planet for about __________ percent of Earth history.

• A) 0.1
• B) 1.0
• C) 10
• D) 50

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Definitions:

Reproduction

Processes by which organisms produce offspring.

Rodents

A large order of mammals characterized by two continuously growing incisors in the upper and lower parts of their mouth, which must be kept short by gnawing.

Teeth

Hard, calcified structures in the jaws of many vertebrates, used for biting, chewing, and sometimes for defense.