Question

What are the three types of nutrition?

Answer 1

ANSWER :

Three types of nutrition :

1)AUTOTROPHIC NUTRITION :

• In autotrophic nutrition organisms synthesize their own food from the low energy inorganic raw materials(CO2 and H2O) from their spurroundings without depending upon other organisms
• Autotrophic nutrition result is glucose formation

They are of 2 types :

• a)Photoautotrophs : uses photosynthesis as source of energy. Example : plants and green bacteria containing chlorophyll.
• b)Chemoautotrophs : uses chemosynthesis as a source of energy. Example: non green sulphur bacteria

2)SYMBIOTIC NUTRITION :

• In symbiotic nutrition organisms get nutrition by mutualism
• Two organisms get their nutrition from each other
• Example : Rhizobium bacteria lives in the roots of leguminous plants . Rhizobium gets nutrition from the plant and plant gets the nitrates for its growth from rhizobium, as rhizobium fixes atmospheric nitrogen into nitrates

3)HETEROTROPHIC NUTRITION :

• In heterotrophic nutrition one organism depend on other organism for its food or nutrition

They are of 3 types :

• Holozoic nutrition : In this organisms ingest complex food into the body , digest it and absorb the simpler form of food produced after digestion. Example : Humans , lion etc
• Saprophytic nutrition : In this organisms digest the food outside the body before ingesting by secreting digestive enzymes on to dead and decaying matter and then absorps the simpler form of products obtained. Example : houseflies , bacteria, fungi etc
• Parasitic nutrition : In this organisms live in or on the body of another organism to get the nutrition.Example: Round worm , tapeworm, plasmodium etc.