An essential amino acid can be synthesized in the body if caloric intake is adequate. cannot be synthesized in the body in sufficient quantity to meet body needs. can be formed in the body from nonessential amino acids. can be synthesized in the body if there is a nitrogen source.

cannot be synthesized in the body in sufficient quantity to meet body needs.  

Explanation:

Amino acids are defined as the structural units which make up the proteins in our bodies. They help to break down foods, repair tissues, and serves many more functions.

Our body is not capable of making the essential amino acids that are required by the body. They should be come from the food we eat.  And hence the essential amino acids cannot be synthesized in our body in the sufficient quantity to meet our body needs.

c. genetic engineering

explanation:

1. a tropical dry forest carries out more rapid nutrient cycling