Which One of the Following Statements About Mass Extinctions Is

question 12

Multiple Choice

Which one of the following statements about mass extinctions is false?

• A)The five major mass extinctions were all followed by a rebound in species diversity.
• B)By definition,in mass extinctions all major groups are affected equally.
• C)Major changes in the direction of evolution have often occurred after mass extinctions.
• D)The five major mass extinctions were caused mainly by geological events and,perhaps,collision with asteroids.
• E)Rebound from the current,sixth mass extinction may be slower than in previous mass extinctions.

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Definitions:

Testosterone

A steroid hormone that stimulates development of male secondary sexual characteristics, produced mainly in the testes.

Prolactin

A hormone produced by the anterior pituitary gland that stimulates milk production in mammals after childbirth.

Dopamine

A neurotransmitter in the brain that plays a key role in controlling the brain's reward and pleasure centers as well as regulating movement and emotional responses.

Serotonin

A neurotransmitter that contributes to feelings of well-being and happiness, regulating mood, appetite, and sleep.