Question

breifly describe the types of heterotrophic nutrition .​

Answer 1

Heterotrophic nutrition is the mode of nutrition in which organisms depend upon other organisms to survive. All animals and non green plants are heterotrophic.

Heterotrophic organisms have to acquire and take in all the organic substances they need to survive.[1]

All heterotrophs (except blood and gut parasites) have to convert solid food into soluble compounds capable of being absorbed (digestion).Then the soluble products of digestion for the organism are being broken down for the release of energy (respiration). All heterotrophs depend on autotrophs for their nutrition. Heterotrophic plants have only four types.

The four main types of heterotrophic nutrition are:

Holozoic nutrition: the word holozoic is made from two words- holo= whole and zoikos= animals and literally means animals which eat their food whole. Complex food is taken into a specialist digestive system and broken down into small pieces to be absorbed. This consists of 5 stages, ingestion, digestion, absorption, assimilation and egestion. E.g.: human

Saprobiontic/saprophytic nutrition: Organisms feed on dead organic remains of other organisms.

Parasitic nutrition: Organisms obtain food from other living organisms (the host), with the host receiving no benefit from the parasite.When a parasite is present inside the body of the host, it is known as an endoparasite. These parasites suck and feed on the blood of the host. E.g.: tapeworms

Symbiotic nutrition:Two organisms live in close association to benefit each other or one of the two benefits the other whilst it itself suffers neither loss but nor does it gain. E.g.: fungi and algae, rizobium and leguminous plants roots.

Answer 2

here is your ans.....

heterotrophic nutrition is of three types ...

1. holozoic nutrition : herbivorous carnivorous and omnivorous posses the holozoic mode of nutrition .in this mode of nutrition complex food molecules are taken in and then broken down into simpler and soluble molecules .

2saprotrophic nutrition :saprotrophs are the organisms which feed on dead organic matter, these organisms break down the complex food outside the body and then absorb it. eg mushroom yeast and bacteria .

3 parasitic nutrition: parasites are the organelles having parasitic nutrition. these organisms live together on or inside the body of other organisms to obtain their nutrition without killing them .eg plants like cuscuta ,yellow rattle etc

hope this will help you