Proteins are broken down to form ammonia, which is toxic to cells. in which organ of the body is this ammonia converted to the less toxic compound urea?

a. liver
b. lungs
c. skin
d. kidneys

the food storage products of chrysophytes are oils or the polysaccharide laminarin.   formerly classified as plants, the chrysophytes contain the photosynthetic pigments chlorophyll a and c all but the yellow-green algae also contain the carotenoid pigment fucoxanthin.