Which kind of organism is a autotroph

Explanation:

{Auto-self, troph-food}

An autotroph is an organism that is able to produce its own food, which are usually complex organic substances from simple inorganic substances.

Unlike heterotrophs, they are not dependent on other organisms for their source of energy.

In the flow of energy in an ecosystem, they are commonly referred to as producers because other organisms, mostly animals are dependent on them for energy. This autotrophic ability is a characteristics of most plants, green algae and photosynthetic bacteria.

Autotrophs are in two category viz;

1. Photoautotrophs; which use light as a source of energy to power the synthesis of organic substances in a process called photosynthesis. These organisms possess pigments that makes them capable to capture the photons of light. Examples are green plants, green algae etc.

2. Chemoautotrophs, which use chemical inorganic compounds e.g Hydrogen sulfide, ammonia etc. as a source of energy to synthesize their food. Examples include archaebacteria