
Next to carbon and oxygen, the element organisms most require is
A) sulfur.
B) phosphorus.
C) iron.
D) potassium.
E) nitrogen.
Correct Answer:
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Q19: The problem of not being able to
Q20: The practice of cells turning on the
Q21: The zone of soil that surrounds the
Q22: Atmospheric nitrogen is
A) used directly by plants.
B)
Q23: The organisms that convert carbon dioxide into
Q25: The sulfur cycle is similar to the
Q26: During anaerobic decomposition of organic matter with
Q27: The nitrogen in our atmosphere is only
Q28: The carbon cycle revolves around
A) nitrogen.
B) carbon
Q29: Azotobacter
A) are the chief suppliers of fixed
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