How to organisms obtain their food?
Answers
The process of obtaining food is called nutrition.
Autotrophic mode of nutrition - Green plants absorb carbon dioxide from air and water from soil. With the help of sunlight and chlorophyll they convert these materials into food. This process is called photosynthesis. Having ability of making own food are called Autotrophs.
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.
Holozoic modes of nutrition is a method of nutrition that involves the ingestion of liquid or solid organic material, digestion, absorption and assimilation of it to utilize it. For example, amoeba.
Saprophytes are the animals which feed on dead and decaying animals. For example, moulds, mushroom etc.
Parasitic mode of nutrition is that in which organism feeds on a living organism (host). For example, leach, flatworm,plain worms etc.
Autotroph is an organism that manufactures its own food from inorganic substances, such as carbon dioxide and ammonia. Most autotrophs, such as green plants, certain algae, and photosynthetic bacteria, use light for energy.
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Autotrophic organisms make their own food by a process called photosynthesis. Green plants, for example, manufacture sugar and starch from carbon dioxide and water using the energy of sunlight to drive the necessary chemical reactions. Heterotrophic organisms obtain their food from the bodies of other organisms.