Which of the following are "usable" forms of nitrogen (N) and sulfur (S) that plants and animals can assimilate to build proteins? A)both N₂ and NO₃ B)both S₂ and S₃ C)both SO₄ and NO₃ D)both NH₃ and S₂ E)both N₂ and S₂

Question

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Plants and animals can assimilate nitrogen in the form of nitrate (NO₃⁻) and sulfur in the form of sulfate (SO₄²⁻) to build proteins.

Which of the Following Are "Usable" Forms of Nitrogen (N)