40 points
which of these compounds are a source of nitrogen for animals
a) nitrates
b0 proteins
c) nitrites
d) ammonia

The answer to your question is: Proteins

Explanation:

Ammonia, nitrites and nitrates are part of the Nitrogen cycle where plants absorb nitrogen, when animals eat vegetables, adquiere nitrogen as proteins.

A) nitrates  

B) proteins  This is the correct answer.

C) nitrites

D) ammonia

linnaeus is the father of taxonomy, which is the system of classifying and naming organisms. one of his contributions was the development of a hierarchical system of classification of nature. today, this system includes eight taxa: domain, kingdom, phylum, class, order, family, genus, and species.