Here's why:
* Photo: Refers to light, the energy source for photosynthesis.
* Auto: Means "self" and indicates that the organism produces its own food.
* Troph: Refers to nourishment.
Therefore, a photoautotroph is an organism that uses light energy to synthesize its own food. This is distinct from heterotrophic organisms, which obtain their food by consuming other organisms.
Examples of photoautotrophs include:
* Plants: The most common example, with chloroplasts containing chlorophyll for capturing sunlight.
* Algae: A diverse group of aquatic organisms that also perform photosynthesis.
* Some bacteria: Certain types of bacteria can perform photosynthesis using different pigments.
