Where does a peptide bond form? between the five-carbon sugar of one nucleotide and the phosphate group of another nucleotide
between the R group of one amino acid and the carboxyl group of another amino acid
between the amino group of one amino acid and the carboxyl group of another amino acid
between the nitrogenous base of one nucleotide and the phosphate group of another nucleotide

The combined mass of both

Mitochondrian would be the correct answer

Hmm this is a hard heterotroph's can't produce its own food. a human can produce it's own food because people kill animals and eat them like squirrel, deer, oak trees need rain which they don't produce the rain, bee's need flowers and pollen and nectar but they don't produce it either, rabbit's don't produce either, because they either steal carrots from your garden and eat leaves.so, the best answer that i would pick is a. humanshope my answer has you and sorry if it doesn't : ) : (