In the Classic Work of Dan Janzen and Acacia Trees

question 14

Multiple Choice

In the classic work of Dan Janzen and acacia trees, Janzen supported his contention that ants were critical to the survival and growth of acacia trees with a variety of data and observations. Which of the following was NOT evidence of Janzen's contention?

• A) Trees with ants had fewer herbaceous insects as compared to trees without ants.
• B) Trees with ants tend to be heavier than trees without ants.
• C) Trees with ants produced more flowers that lasted longer than trees without ants.
• D) Trees with ants had higher comparative survival rates than trees without ants.

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Definitions:

Adaptive Advantage

A genetic trait that enhances an organism's ability to survive and reproduce in its environment.

Dark Skin

A human skin color that is rich in melanin pigments, particularly eumelanin, often found in populations close to the equator to protect against ultraviolet radiation.

Solar Radiation

The radiant energy emitted by the sun, particularly electromagnetic energy that reaches the Earth.

Melanin

A dark pigment produced in the outer layer of the skin that protects against damaging ultraviolet solar radiation.