EVERYDAY SCIENCE

Detailed explanation-1: -Plants, algae, and a group of bacteria called cyanobacteria are the only organisms capable of performing photosynthesis. Because they use light to manufacture their own food, they are called photoautotrophs (“self-feeders using light”).

Detailed explanation-2: -Examples of photosynthetic bacteria are Cyanobacteria, Chlorobi (green sulfur bacteria), Proteobacteria (also known as purple bacteria), and Chloroflexi (filamentous bacteria also known as green non-sulfur bacteria), Proteobacteria (also known as purple bacteria), etc.

Detailed explanation-3: -Some types of bacteria are autotrophs. Most autotrophs use a process called photosynthesis to make their food. In photosynthesis, autotrophs use energy from the sun to convert water from the soil and carbon dioxide from the air into a nutrient called glucose.

Detailed explanation-4: -Melainabacteria are non-photosynthetic and non-respiratory but contain homologs to genes encoding light response regulators in photosynthetic Cyanobacteria. Oxygenic photosynthesis is perhaps the most exceptional characteristic of Cyanobacteria, as all other bacterial photosyntheses are anoxygenic.

Detailed explanation-5: -Heterotrophs (consumers, including bacteria) live by consumption of biomass or nonliving organic matter.