The energy released from the sun and other stars comes from
A) the fusion of helium into hydrogen.
B) the fusion of hydrogen into helium.
C) the fission of helium into hydrogen.
D) the fission of hydrogen into helium.
B
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Crops grown in the mixed crop and livestock region are used primarily to feed animals
Indicate whether the statement is true or false.
The oldest known fossil bat is from rocks of ________ age. Fill in the blank(s) with the appropriate word(s)
North America with roughly 4.5% of the world's population consumes about 40% of the gasoline produced in the world.
Answer the following statement true (T) or false (F)
Judge the following sentence according to the criteria given below: Organisms found at mid-ocean ridges are able to survive in the absence of sunlight BECAUSE the light generated by the undersea lava flows is enough for photosynthesis to occur
A) The assertion and the reason are both correct, and the reason is valid. B) The assertion and the reason are both correct, but the reason is invalid. C) The assertion is correct, but the reason is incorrect. D) The assertion is incorrect, but the reason is correct. E) Both the assertion and the reason are incorrect.