What is the reason why we call "fossil fuels" as such?
a. They are the remnants of fuels.
b. They are the remnants of fossils.
c. They are the remnants of ancient forests.
d. They are the remnants of modern forests.
Answer: c. They are the remnants of ancient forests.
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In which of the following types of waters do seasonal climatic temperature changes result in distinct chemical and microbial stratification?
A. Oceans B. Lakes in tropical areas C. Fast flowing rivers D. Lakes in temperate areas
In a natural community, the primary consumers are ____
a. herbivores b. carnivores c. detritivores d. decomposers e. producers
The releasing site for the hormones of this figure is
indicated by a. A. b. B. c. C. d. D. e. E.
What is the coefficient of relatedness for individuals A and B in the following pedigree?
a. 0.5 c. 0.125 b. 0.25 d. 0.0625