Whales and Pigs Diverged About 80 Million Years Ago

question 135

Multiple Choice

Whales and pigs diverged about 80 million years ago.If a DNA sequence has had 24 changes between whales and pigs, the rate of change for this sequence would be _______ changes per million years.

• A) 0.15
• B) 0.24
• C) 0.3
• D) 0.48
• E) 0.6

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Definitions:

Psychoactive Drug

A substance that chemically alters brain activity, leading to changes in how we perceive things, feel, remain conscious, think, or act.

Sleeping Aid

A substance or method used to help an individual fall asleep or improve the quality of sleep.

Potent Stimulant

A substance that dramatically increases alertness, attention, and energy by stimulating the central nervous system.

Dangerous Stimulant

A substance that raises levels of physiological or nervous activity in the body, potentially posing health risks.