1.An autotroph is an organism that creates its own food through photosynthesis or chemosynthesis. This is like a plant or protist.
2.carbon and energy(food) requirments of the autotrophic organisms are fulfilled by photosynthesis.
1.A heterotroph is like a human or other animal; they cannot produce their own food and must eat other organisms to live.
2.heterotrophic organism are are in capable to carry out photosythesis.