Interactions within species
AN ANIMAL'S GENETIC BLUEPRINT is not just a construction plan. as containing instructions for physical characteristics such as brown feathers, sharp teeth, or wrinkly skin, it also contains instructions behavior. behavior is whatever an animal does, and how it does consist of different actions that help an animal to survive and to reproduce. Even simple organisms, such as single-celled Paramecium (p.13), can have quite complex behavior. Paramecium normally away form obstacles and then changes course. To carry out sexual reproduction, however, it has to line up with a partner. Although Paramecium does not have a nervous system or any sense organs, it tell the different between a partner and an obstacle, and it then in an appropriate way. In more complex animal, interactions between members of the same species are much more elaborate. Most animal have ways of communicating with rivals or relatives, and many have special courtship rituals that they use to acquire a mate. Some animal have evolved special ways of life that depend on working together. Among insects, These "social" lifestyles reach a peak in the world of a bees, and wasps. The ability to cooperate "socially" is one of the reason why these animals are so successful and so widespread.