| < strong>Autotrophic nutrition | < strong>Heterotrophic nutrition |
| $(i)$ Food is synthesized from simple inorganic raw materials such as $CO_2$ and water. | $(i)$ Food is obtained directly or indirectly from autotrophs. This food is broken down with the help of enzymes. |
| $(ii)$ Presence of green pigment (chlorophyll) is necessary. | $(ii)$ No pigment is required in this type of nutrition. |
| $(iii)$ Food is generally prepared during daytime. | $(iii)$ Food can be obtained or processed at all times. |
| $(iv)$ All green plants and some bacteria exhibit this type of nutrition. | $(iv)$ All animals and fungi exhibit this type of nutrition. |
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