Sulfur is needed by plants for
A) nitrogen fixation.
B) nucleic acid synthesis.
C) amino acid and protein synthesis.
D) maintaining electrical neutrality.
Correct Answer:
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Q14: Green plants are the ultimate source of
Q15: A 5-15-20 fertilizer has what percentage of
Q16: The three primary plant nutrients are
A)phosphorus, nitrogen
Q17: The conversion of phosphate rock and bone
Q18: DDT was NOT effective against
A)foxes.
B)grapevine pests.
C)lice.
D)mosquitos.
Q20: DDT is concentrated in living organisms because
Q21: Identify the compound that is NOT a
Q22: In 1957,Clear Lake in California was sprayed
Q23: An experimental pesticide with a very specific
Q24: Organophosphorus pesticides are generally less _ than
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