Question

Explain the different types of heterotroph based on the mode of their nutrition

Answer 1

Parenteral nutrition (PN) is the feeding of specialist nutritional products to a person intravenously, bypassing the usual process of eating and digestion. The products are made by specialist pharmaceutical compounding companies and is considered to be the highest risk pharmaceutical preparation available as the products cannot undergo any form of terminal sterilization. The person receives highly complex nutritional formulae that contain nutrients such as glucose, salts, amino acids, lipids and added vitaminsand dietary minerals. It is called total parenteral nutrition (TPN) or total nutrient admixture (TNA) when no significant nutrition is obtained by other routes, and partial parenteral nutrition (PPN) when nutrition is also partially enteric. It may be called peripheral parenteral nutrition (PPN) when administered through vein access in a limb rather than through a central vein as central venous 

Answer 2

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TYPES OF HETEROTROPHIC NUTRITION:-

1. Saprophytic Nutrition

•It is a mode of heterotrophic nutrition in which food is obtained from organic remains like dead organisms, excreta, fallen leaves, broken twigs, food articles, etc.

•Organisms performing saprophytic nutrition are called saprophytes.

2. Parasitic Nutrition

•It is a mode of hetrotrophic nutrition in which a living organisms flourishes by obtaining food from another living organism.

•The lving organisms which obtains food and shelter from another organism is called parasite.

•The organism which provides food and shelter to a parasite is known as host. An external plant parasite is Cuscuta.

•It is a non-green plant that sends haustroria or sucking roots into host plant for obtaining food and water.

3. Holozoic Nutrition

•It is a mode of heterotrophic nutrition which involves intake of solid pieces of food.

•Since solid food is taken in, holozoic nutrition is also called ingestive nutrition.

•The food may consist of another animal, plant or its parts.

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