Adaptation describes how a plant of animal is able to survive in various environments. Prime objective of this lecture is to present on Adaptation. Well adapted organisms can cope with the different aspects of their environment, for example, the temperature. It is always a struggle for plants and animals to survive. Animal Struggle: For food, for water, for protection against weather, against being eaten by predators, against disease, against accidents etc. Plants Struggle: For water, for light, for minerals in the soil, against weather, against disease.