Estimates of Current Rates of Extinction

question 44

Multiple Choice

Estimates of current rates of extinction

• A)indicate that rates of speciation equal extinction,so an equilibrium has been reached.
• B)suggest that one-half of all animal and plant species may be gone by the year 2100.
• C)indicate that rates may be greater than extinction rates seen in the fossil records.
• D)indicate that only 1% of all of the species that have ever lived on Earth are still alive.
• E)suggest that rates of extinction have decreased globally but have increased locally.

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Definitions:

Risky Activity

Engagements or behaviors that involve a significant likelihood of suffering harm or loss.

Self-Control

The ability to regulate one's emotions, thoughts, and behaviors in the face of temptations and impulses.

Inhibition

The psychological process that restrains or suppresses an impulse, desire, or behavior.

Obesity

A medical condition characterized by excess body fat accumulation, posing significant health risks.