The difference in the mode of heterotrophic nutrition in fungi, parasites, and mammals can be attributed to _____ .
Both A and B
Each organism is adapted to its environment. The form of nutrition differs depending on the type and availability of food material as well as how it is obtained by the organism. For example, fungi and much simpler organisms obtain food by dissolving it outside the body and then absorbing the digested food. Whereas mammals, due to complex body structure and availability of different food can be herbivores or carnivores.