An adaptation is a variation of structure, physiology or behavior that aids the organism's survival in its particular environment. Below are examples of some of the many adaptations. Cellulose is the component of plant walls and can only be digested with the enzyme cellulase, which vertebrates do not produce.
Ruminants have a four-chambered stomach.
Then swallowed into the stomach proper where it is digested fully. Organisms that live in dry climates must have adaptations that allow them to obtain water. Other animals obtain fluids from the sap of plants or from the bodies of the animals they eat. Because of the limited water available, animals in dry climates also have means of conserving water. They are nearly all nocturnal, only searching for food at night when the heat is low.