Discuss any three types of heterotropic modes of nutrition
Answers
Answer:
hey mate here is the answer
Explanation:
Types of Heterotrophic Nutrition
Heterotrophic nutrition can be divided into the following types:
- Holozoic Nutrition
Holozoic nutrition means the feeding of solid and liquid food by animals. This involves the steps of ingestion, digestion, absorption, assimilation, and excretion.
Ingestion is the intake of food, which is broken down into simpler organic matters by a process called digestion. After extraction of useful components, every other unwanted and indigested particle is excreted out.
Other holozoic organisms are animals like cat, deer, dog etc. and also amoeba.
What is Holozoic Nutrition in Amoeba?
The holozoic nutrition in amoeba takes place in the following steps:
Amoeba feeds through the process of holozoic nutrition. The amoeba projects its pseudopodia and encircles the food. It then engulfs the food by the process of phagocytosis.
The food vacuoles of amoeba are rich in digestive enzymes which break the food into simpler substances. This process is known as digestion.
The digested food is absorbed into the cytoplasm leaving behind the undigested materials. This absorbed food is utilized to produce energy for the growth and development of the cell.
The undigested food material is ejected out by the rupturing of the cell membrane.
Types of Holozoic Organisms
Holozoic organisms can be divided into three types:
Herbivores- These organisms depend upon plants for their food. For eg., cows, buffaloes. deer, elephants, etc.
Carnivores- These animals feed on other animals for their food. For eg., lion, tiger, leopard, etc.
Omnivores- These animals depend upon both plants and animals for their food. For eg., cockroach, pig, crow, ant.
- Saprophytic Nutrition
Saprophytes (animals which follow saprophytic nutrition) feed on dead and decayed organisms for energy. They consume dead and decayed remains of animals and plants. In this way, they help clean the environment.
Some examples of saprophytes are fungi and certain types of bacteria. These are also responsible for the staling of bread, cakes etc.
Saprophytes release certain enzymes to act on the complex organic matter and break it into simpler substances which can be easily consumed by them.
- Parasitic Nutrition
Organisms which feed on other organisms by deriving out nutrients from other animals (hosts) are called parasites. Parasites extract the nutrients from the host and are harmful to their health, sometimes they even kill the host. Both animals and plants may serve as host.
In the case of a parasite, the host is never in benefit. Few examples of parasites are louse on a human head, Cuscuta plant, and tapeworms.
Based on feeding habits heterotrophs are classified as herbivores, carnivores, and omnivores.
Answer:
carnivore-eat only flash
omnivore -eat both plant and animal
herbivore -eat inly plants
HETEROTROPHIC MODE-
1-Holozoic
2-parasitic
3-saprophytes