Refer to the Figure

question 51

Multiple Choice

Refer to the figure.
Which of the following hypotheses for the global latitudinal gradient in species is not supported by the figure?

• A) The tropics and temperate regions have had similar speciation rates, but extinction rates have been lower in the tropics.
• B) The tropics and temperate regions have had similar extinction rates, but speciation rates have been higher in the tropics.
• C) The tropics have had more time for diversification than temperate regions have.
• D) Temperate regions have experienced lower diversification rates than the tropics have.

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A hormone produced by the pineal gland that regulates sleep and wakefulness.