Apentix/AP Environmental Science/Unit 9: Global Change/Question
AP Environmental Scienceeasymcq1 pt

The current biodiversity crisis is often called the sixth mass extinction because

A.extinction rates are far above background levels
B.exactly five species went extinct
C.extinctions have stopped
D.only dinosaurs died

Explanation

Core Concept

Species are vanishing hundreds to thousands of times faster than the fossil background rate, driven this time by human activity.

Correct Answer

Aextinction rates are far above background levels

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