(A) Proteins (X)
(B) Nitrates ()
(C) Ammonium ions (X)
(D) Nitrites (X)
Answers: Animals use nitrogen in the form of Nitrates.
(A) Proteins (X)
(B) Nitrates ()
(C) Ammonium ions (X)
(D) Nitrites (X)
Answers: Animals use nitrogen in the form of Nitrates.
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