To maintain adequate nutrition, animals require dietary access to certain amino acids. an amino acid that is referred to as "nonessential" would be be

Students in biology are studying the macromolecules of life. they used a calorimeter to determine the calories in various types of food. once the lab was completed, the students ate the left over food samples. monica commented that in just 6 or 7 "chews" of the saltine, it was gone; nothing but a sticky paste in her mouth. elaborate on what happened chemically while chewing the saltine. include the macromolecules present.

How does human environment effect the biosphere

Some substances but not other can cross the (blank) membrane of a cell