The Fossil Record Shows That for Many Plant and Animal

question 54

Multiple Choice

The fossil record shows that for many plant and animal groups, the time between speciation events

• A) is usually about 50,000 years.
• B) varies greatly, but averages 6.5 million years.
• C) is usually greater than 40 million years.
• D) is equivalent to the length of 100 generations of a species.

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Definitions:

Carbonic Acid

A weak acid formed in solution when carbon dioxide is dissolved in water, playing a critical role in the buffering system of the blood.

Acid-Base Balance

The mechanism by which the human body maintains its blood pH within a narrow range, crucial for normal bodily functions.

Metabolic Acidosis

A condition characterized by a deficiency of bicarbonate ions in the body in relation to the amount of carbonic acid in the body, in which the pH falls to lower than 7.35.

Respiratory Alkalosis

A state of excessive loss of carbon dioxide from the body.