'Life Science'' is a branch of science, under which we study about the living beings in detail. We study about the body structure; all the organs of the body and their functions. The body consists of several organs, Tissues are made of cells. Plants are very useful for living organisms as they supply oxygen for the respiration and they are the food-source for the primary consumers. Plant survival and growth is critically including Water, air and light. The effect of the local environment on plant growth also accounts for much of variation in adult form within species. Plants have green pigments, which are quite useful in the process of photosynthesis. In the presence of light, plants make their food with the help of minerals, water and carbon dioxide, in their green leaves, in the form of carbohydrates. The food prepared in green leaves is transported to different parts of the plant by phloem.