2. Photosynthetic organisms are also called

photoautotrophs

Explanation:

Photosynthetic organism are called photoautotrophs this is because they have the ability to produce there own food using CO2 and H20 and energy from sunlight to generate glucose and oxygen.

Heterotrophs who do not produce there food depends on them and other organic sources for their food.

Example of photoautotrophs include, Algea,plant,bacteria,Euglena.