EVERYDAY SCIENCE

Detailed explanation-1: -The three ways by which bacteria obtain food are photosynthesis, chemosynthesis, and symbiosis.

Detailed explanation-2: -Some types of bacteria are autotrophs, meaning they make their own food. Cyanobacteria are like plants in that they use chlorophyll to capture sunlight for energy. Bacteria that cannot produce their own food are called heterotrophs and must get their energy from organic material.

Detailed explanation-3: -Chemoheterotrophs, by contrast, get both their energy and carbon from other organisms. A major difference between autotrophs and heterotrophs is that the former are able to make their own food by photosynthesis whereas the latter cannot.

Detailed explanation-4: -Green plants are the only living organisms that produce their own food. Light provides the energy to create a chemical reaction within specialized cells, called chloroplasts, in the leaves. Chlorophyll present in the chloroplasts captures light energy and uses it to produce simple sugars from carbon dioxide and water.