(A) Carbon (✔)
(B) Nitrogen (X)
(C) Hydrogen (X)
(D) Ammonia (X)
Answer:The molecules of living matter that provide building blocks are mostly based on carbon.
(A) Carbon (✔)
(B) Nitrogen (X)
(C) Hydrogen (X)
(D) Ammonia (X)
Answer:The molecules of living matter that provide building blocks are mostly based on carbon.
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