Question

How did grass help to man ?

Answer 1

Grass are autotrophs and also the producers which form the first step in a food chain. They fix up the solar energy and make it available for heterotrophs or the consumers. This energy supports all the activities of the living world. The producers capture 1% of the energy of sunlight and convert it to food energy. From autotrophs, the energy goes to the other trophic levels. If man eat only plant then they are primary consumer. If man eat an organism that eats the plant, then they are a secondary consumer. Thus, from the producers the energy is transferred from one trophic level to another and some energy is lost to the environment in forms which cannot be used again. Thus the man get little energy from the producers which is available in each step of the food chain.