_____ is the source of energy and materials in human beings.
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Which of the following planets has the highest revolutionary motion?
Helium is added to the oxygen supply of deep sea divers because it is _________
A school always has a
Cannis Vulpes is the scientific name of
Name the metal that can be easily cut with a knife:
Triton is the moon of which planet?
Why do the plant closes stomata when it does NOT need carbon dioxide for photosynthesis?