Among the non-mammalian vertebrates, the cloaca is an anatomical structure that function as a shared pathway for the digestive, excretory, and reproductive systems. Cloaca in vertebrates, common chamber and outlet into which the intestinal, urinary, and genital tracts open. It is present in amphibians, reptiles, birds, elasmobranch fishes, and monotremes. Cloaca is not present in placental mammals or in most bony fish.
They are composed of proteins. I cannot see the options but hopefully that answer is in one of them
The population doesn’t grow(increase) anymore and the number of organisms stay at about that point(the carrying capacity).
The Arenal Volcano in Costa Rica
