Imagine a population of monkeys in South America whose habitat has been reduced to the point where only 25 monkeys survive. This is an example of:
A) population bottleneck. B) natural selection.
C) founder effect. D) genetic drift.
Answer: A
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Indicate whether this statement is TRUE or FALSE.
The main benefit to a plant from a mycorrhizal association is ____
a. enhanced water uptake b. removal of excess carbohydrates c. enhanced flow of carbohydrates to the roots d. enhanced mineral ion uptake e. enhanced protection of roots from bacterial infections
The valence number is the
A. atomic weight. B. number of neutrons. C. number of electrons in the innermost orbital. D. number of electrons in the outermost orbital. E. number of protons.
Approximately what percentage of the visible light that reaches Earth's producers is converted to chemical energy?
A) 10% B) 0.1% C) 1% D) 0.01%