write brief notes about different modes of nutrition.
Answers
Answer:
On the basis of their modes of nutrition, all the organisms are divided into two main groups –
autotrophs and heterotrophs.
Autotrophs ---
Those organisms that can make food themselves from simple substances like carbon dioxide and water are called autotrophs. Their mode of nutrition is referred to as autotrophic. They do this by the process of photosynthesis.
All the green plants are called autotrophs. This is due to the fact that the green plants make their own food from very simple substances like carbon dioxide and water that is present in the surroundings. They do this by the process of photosynthesis.
We can also say that the green plants have an autotrophic mode of nutrition.
Heterotrophs ---
Heterotrophs are referred to those organisms which cannot prepare their own food. They are dependent on green plants or animals for their food. Their mode of nutrition is known as the heterotrophic mode of nutrition. All the non-green plants and animals, inclusive of human beings, are called heterotrophs.
The non-green plants lack chlorophyll which is necessary to carry out the process of food referred to as photosynthesis. Therefore, they depend on other organisms i.e. plants and animals in order to obtain food.
The non-green plants, for example. Fungi, yeast, mushroom, bread mold, are called heterotrophs.
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Answer:
On the basis of their modes of nutrition, all the organisms are divided into two main groups – autotrophs and heterotrophs. Their corresponding modes of nutrition are known as the autotrophic and heterotrophic mode of nutrition.