Comparisons and Differences between Autotrophic and Heterotrophic Nutrition

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Autotrophic NutritionHeterotrophic Nutrition
Food. It is self manufactured.Food is obtained readymade from outside.
External Energy. An external source of energy is required for synthesis of food. Food is obtained readymade from outsideAn external source of energy is not required. The required energy is present in the food obtained from outside.
Inorganic Substances. They constitute the raw materials for manufacturing food.Inorganic substances are not much required
Digestion. It is absent.An external or internal digestion is required for conversion of complex organic materials into simpler and soluble ones.
Chlorophyll. It is present for trapping light energyChlorophyll is absent.
Status. Organisms performing autotrophic nutrition function as producers.
Examples. Green plants, some bacteria, some protists
Organisms performing heterotrophic nutrition function as consumers. Animals, many protists and monerans

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