How many quanta of light are needed to reduce one molecule of carbon dioxide to carbohydrate during photosynthesis?
A. 10-12
B. 2
C. 3
D. 4
Answer: A
Biology & Microbiology
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The walls of the descending limb of the loop of Henle are relatively permeable to sodium. Indicate whether the statement is true or false
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Some animal populations are kept in check by
A. hosts. B. decomposers. C. amensalism. D. predators.
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If two or more phenotypes in a population are both favored by selection, what is happening?
A) Stabilizing selection B) Sexual selection C) Gene flow D) Directional selection E) Balanced polymorphism
Biology & Microbiology
The systemic circuit contains more blood at any one time than does the pulmonary circuit.
Answer the following statement true (T) or false (F)
Biology & Microbiology