Answer:
Autotrophs are the organisms which have ability make their own food using various sources of energy. Examples are can green plants and algae such as <em>Spirogyra, Chlorella, Volvox</em> make their food using sunlight carbon dioxide and water. they are photoautotrophs
Some bacteria are also make their food using chemical energy through oxidation. They are chemoautotrophs.
Answer
The key markers for the identification of bacteria are special RNA polymerase, peptidoglycan in cell walls. ester-linked fatty acids.
Explanation:
