A student weighed each of several mice born from the same parents, and then placed the mice in separate cages where all mice received identical diets. Half of the mice were given additional amounts (supplements)
of selected amino acids. Half of the mice received no amino acids. After four weeks, all mice were weighed
again and their weights were compared.

i think that it is plants

silty loam

hope this

answer: the correct option is d. enzyme

lactase and carbonic anhydrase are the examples of enzymes.

lactase is an enzyme, which is present in the small intestine of mammals. it in the digestion of the disaccharide, lactose ( milk sugar) by converting it into two monosachharide, which are glucose and galactose.

carbonic anhydrase is present in the red blood cells. this enzyme plays significant role in the transport of co₂. it in the conversion of co₂ and h₂o into carbonic acid, which is then dissociated into bicarbonate ions and hydrogen ions.

the answer u all are looking for is 4000000000000000000000 million years.