Which of the following is the primary limiting factor that controls the vegetative character of a biome?
a. light
b. precipitation
c. nutrients
d. soil type
e. predation
Ans: b. precipitation
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What was the effect of glaciation on soil fertility?
A) It increased fertility all over Canada. B) It decreased fertility all over Canada. C) It increased fertility in northern Canada, but decreased it in the Ohio River basin. D) It decreased fertility in northern Canada, but increased it in the Ohio River basin.
Which of the following colors is never found in the interior of a rainbow?
A) red B) green C) orange D) blue
Use your knowledge of plate boundaries to answer whether a volcano is likely or unlikely to form at the location of the red triangle.
A. likely B. unlikely
Before the 1960s, how did geologists view the ocean basins and continents of the Earth?