Question

What are the various modes of nutrition in plant ? give one example each.
​

Answer 1

The process of obtaining food and utilizing it to grow, stay healthy and repair any damaged body part is known as nutrition. Plants produce their food by taking raw materials from their surroundings, such as minerals, carbon dioxide, water, and sunlight. There are two modes of nutrition:  

1. Autotrophic : Plants exhibit autotrophic nutrition and are called as a primary producer. Plants synthesis their food by using light, carbon dioxide and water
2. Heterotrophic : Both animals and human beings are called heterotrophs, as they depend on plants for their food.

Autotrophic Nutrition in Plants

Photosynthesis

1.Plants are able to produce their own food through a process called photosynthesis.

2.The chloroplast is the site of photosynthesis.

3.Food production primarily is carried out in leaves. Water and minerals from the soil are absorbed by the root and transported to the leaves through vessels. Carbon dioxide reaches leaves through stomata – which are small pores on leaves surrounded by guard cells.

4.Chlorophyll is a green pigment present in leaves which helps the leaves capture energy from sunlight to prepare their food. This production of food which takes place in the presence of sunlight is known as photosynthesis. Hence, the sun serves as the primary source for all living organisms

5.During photosynthesis, water and carbon dioxide are used in the presence of sunlight to produce carbohydrates and oxygen.

6.Photosynthesis provides food to all living beings.

7.Oxygen, one of the main components of life on earth is released by the plants during photosynthesis.