diffrence between autotrophs and heterotrophs
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Answer:
Food is the only source of energy for all living organisms on this planet. This food is available from different sources. Living organisms are further divided based on the modes of nutrition:
Autotrophs
Heterotrophs
Here in this article, let us know about the differences between autotrophs and heterotrophs, along with the examples.
Difference between Autotrophs and Heterotrophs
The differences between autotrophs and heterotrophs are given below:
Autotrophs Heterotrophs
Type of Organisms
Usually members of the plant kingdom and certain unicellular organisms like cyanobacteria All members of the animal kingdom
Mode of Nutrition
Autotrophs are producers which prepare their own food. Heterotrophs are the consumers who depend on other sources for their food.
Classified into
These can be classified as photoautotrophs and chemoautotrophs. These can be classified as photoheterotrophs and chemoheterotrophs.
Presence of chloroplasts
The chloroplast helps in preparing food. They do not contain chloroplast, so cannot prepare food.
Energy is obtained from
They obtain energy from inorganic sources by converting light energy into chemical energy. They obtain energy directly or indirectly from other organisms.
Energy Storage
Autotrophs can store light energy and chemical energy. Heterotrophs cannot store energy.
In Food Chain
They are placed at the primary level in the food chain. These are placed in the secondary or tertiary level in the food chain.
Locomotion
They cannot move from their place. Can move from one place to another in search of food and shelter.
Examples
Green plants, algae and a few photosynthetic bacteria are examples of autotrophs. Cows, buffaloes, tigers, horses, humans are examples of heterotrophs.
Autotrophs and Heterotrophs
“Autotrophs are organisms that prepare their own food through the process of photosynthesis, whereas heterotrophs are organisms that cannot prepare their own food and depend upon autotrophs for nutrition.”
Autotrophs
Autotrophs are organisms that undergo autotrophic mode of nutrition. These are the organisms that can prepare their own food from simple substances like carbon dioxide and water. All green plants are examples of autotrophs. These green plants contain chlorophyll pigment in the plant cell that helps in the synthesis of their own food by absorbing energy from the sunlight. All autotrophs are producers and are placed at the primary level in the food web.
Carbohydrates can be converted to fatty acids to produce lipids. Other elements may be added to synthesize organic compounds such as proteins. Carbohydrates, proteins and lipids can be used as energy sources during respiration by both autotrophs and heterotrophs, recycling carbon dioxide so that it may again be used in photosynthesis.
Also, read about Autotrophic Nutrition
Heterotrophs
Heterotrophs are organisms which cannot prepare their own food and depend upon producers or green plants and other animals for their food. This mode of nutrition is known as the heterotrophic mode of nutrition.
Heterotrophs rely on autotrophs to provide a continuous supply of new organic molecules. Heterotrophs are considered as consumers in the food web and are placed at a secondary or tertiary level.
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