If the genetic code consisted of four bases per codon rather than three, the maximum number of unique amino acids that could be encoded would be:

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 : ) : (