Question

what are the different mode of nutrition in plant explain any one types ​

Answer 1

Answer:

There are two main modes of nutrition: autotrophic and heterotrophic.

• Autotrophic nutrition:

The term ‘autotroph’ is derived from two Greek words—autos (self) and trophe (nutrition). In autotrophic nutrition, an organism makes its own food from simple raw materials:

Photosynthesis:

Green plants, which are autotrophic, synthesize food through the process of photosynthesis. Photosynthesis is a process by which green plants, having chlorophyll, synthesize the simple sugar (glucose) from the simple raw materials water and carbon dioxide using the energy of sunlight. Oxygen is released in this process.

Requirements for Photosynthesis:

Photosynthesis requires chlorophyll, carbon dioxide, water and sunlight.

1. Chlorophyll:

Chlorophyll are green pigments found in all photosynthetic organisms and are responsible for their green color. In plants, chlorophyll is mainly found in the leaves. Young stems and fruits may also have chlorophyll. In lower plants like algae, the whole plant is green and takes part in photosynthesis.

2. Carbon dioxide:

Air contains about 0.03% of carbon dioxide. Terrestrial plants use atmospheric carbon dioxide in photos3mthesis. Aquatic plants use the carbon dioxide dissolved in water. Plants obtain carbon dioxide through pores called stomata present on the surfaces of leaves. The opening and closing of these pores are regulated by guard cells, which surround them.

3. Water:

Water is an important raw material for photosynthesis. Plants absorb water from the soil through their root hairs. The water is then transported up to the leaves through the stem.

4. Sunlight:

Light energy is used in splitting water molecules into hydrogen and oxygen. The splitting of water in the presence of light is called photolysis.

• Heterotrophic nutrition:

The word ‘heterotroph’ is derived from two Greek words—heteros (other) and trophe (nutrition). Unlike autotrophs, which manufacture their own food, heterotrophic organisms obtain food from other organisms. As heterotrophs depend on other organisms for their food, they are called consumers. All animals and non-green plants like fungi come under this category.

Consumers which consume herbs and other plants are called herbivores, and those which consume animals are called carnivores. After taking complex organic materials as food, heterotrophs break them into simpler molecules with the help of biological catalysts, or enzymes, and utilize them for their own metabolism.

Depending upon the mode of living and the mode of intake of food, heterotrophs may be parasitic, saprophytic or holozoic.

Answer 2

Explanation:

1. Autotropic nutrition
2. photosynthetic nutrition