Why do they perform heterotrophic nutrition even though they are
photosynthetic?
Answers
Heterotrophic nutrition is a type of nutrition in which organisms depend upon other organisms for food to survive. Heterotrophic organisms have to take in all the organic substances they need to survive.
All animals, fungi, and non-photosynthesizing plants are heterotrophic. In contrast, green plants, red algae, brown algae, and cyanobacteria are all autotrophs, which use photosynthesis to produce their own food from sunlight.
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Answer:
Some plants do not have the chlorophyll. Hence, they cannot synthesize their food by themselves. ... They depend on other organisms for food. Such plants use the heterotrophic mode of nutrition. Some plants cannot produce their own food and must obtain their nutrition from outside sources—these plants are heterotrophic. This may occur with plants that are parasitic or saprophytic.