Individual organisms in a community interact in many different ways. An interaction may benefit both individuals, or the interaction may benefit one organism to the detriment of the other.

Most animals face predation pressure and must avoid or defend themselves against predators in order to survive and successfully reproduce – an important determinant of fitness. In addition to ...

While plants and some bacteria can make their own food, other organisms must eat living things to survive. This makes them predators. You might not think of a grass-munching cow as much of a ...

Animals can also be grouped as either predators that eat other animals or prey that are eaten by other animals. All animals need water to survive. Land animals will get water by drinking it.