What Percentage of the Species That Have Ever Existed on Earth

question 15

Multiple Choice

What percentage of the species that have ever existed on Earth are probably now extinct?

• A) less than 10%
• B) more than 99.9%
• C) about 80%
• D) about 25%
• E) about 75%

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Definitions:

Panic Attacks

Periodic, short bouts of panic that occur suddenly, reach a peak within minutes, and gradually pass.

Dysfunctional Behavior

Actions or behaviors that are disruptive or detrimental to the individual's daily life and functioning.

Social Anxiety Disorder

A persistent fear of social or performance situations in which embarrassment may occur, often leading to significant distress and avoidance behaviors.

Drug Therapy

The treatment of disease by administering chemical substances, especially pharmaceutical drugs.