* Respiration: All living things, from bacteria to humans, perform respiration. This is the process of breaking down glucose (sugar) to release energy in the form of ATP. Respiration is essential for life, as it provides the energy needed for all cellular processes.
* Photosynthesis: Photosynthesis is the process of converting light energy into chemical energy, specifically the production of glucose from carbon dioxide and water. Only autotrophs (plants, algae, some bacteria) perform photosynthesis. They are able to produce their own food using sunlight.
Here's a breakdown:
* Heterotrophs (animals, fungi, most bacteria): They cannot produce their own food and rely on consuming other organisms for energy. They perform respiration but not photosynthesis.
* Autotrophs (plants, algae, some bacteria): They produce their own food through photosynthesis and also perform respiration to use the energy from the glucose they created.
In short, all living things need energy to survive and therefore perform respiration, but only autotrophs can produce their own food through photosynthesis.
