EVERYDAY SCIENCE

Detailed explanation-1: -An autotroph is an organism that can produce its own food using light, water, carbon dioxide, or other chemicals. Because autotrophs produce their own food, they are sometimes called producers. Plants are the most familiar type of autotroph, but there are many different kinds of autotrophic organisms.

Detailed explanation-2: -Thus the organisms which can manufacture organic food materials from simple inorganic substances are called autotrophs. Examples are plants, algae, bacteria etc.

Detailed explanation-3: -Two inorganic substances which are used by autotrophs to make food are carbon dioxide and water.

Detailed explanation-4: -Organisms that can not synthesise their own food are called heterotrophs. Heterotrophs depend directly or indirectly on autotrophs for their food. They do not have photosynthetic organelles as autotrophs. So, they can not synthesise food.

Detailed explanation-5: -Organisms that convert inorganic carbon dioxide (CO2) into organic carbon compounds are autotrophs. Plants and cyanobacteria are well-known examples of autotrophs.