Which intermediary helps to break down minerals into a form digestible by humans?
A) Meteorites
B) Rocks
C) Plants
D) Gravel
Answer: C
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Thinning of some trees from a forest is conversion of the land, not modification
Indicate whether this statement is true or false.
If the mass of Earth somehow became half its original mass with no change in its size, your weight would
A. remain the same. B. decrease to one-half. C. decrease to one-quarter. D. none of the above
Why are phytoplankton critical for marine life?
A) They are large contribution to marine food webs B) They generate massive amounts of atmospheric oxygen C) They are able to bind billions of tons of carbon into carbohydrates D) All of these choices
Factors that increase internal heat production include all of the following, EXCEPT:
A) response to infection. B) excess caffeine. C) hypothyroidism. D) Parkinson disease.