Other minerals are needed in micro-amounts. These elements may be cofactors for proteins or enzymes. Iron, for example is used in small amounts to provide the oxygen binding site in hemoglobin. Obtaining food A. Animals feed off other organisms. The food may be dead or alive, plant or animal.
Herbivores eat autotrophic organisms, plants, algae and autotrophic bacteria.
Carnovores eat other animals. Omnivores eat other animals and autotrophs. Fill in the table below, using your book or your knowledge of animals. A. Injestion Eating is the first stage of food processing. Large animals process their food mechanically using their jaws and the architecture of the jaw is specialized for the type of food the animal eats.