Q.1: Define Nutrition and its types?
Ans: Nutrition:
Definition:
“The Process in which food is obtained or prepared, absorbed and converted into body substances for growth and energy is called Nutrition.
Nutrient:
Nutrients are the materials (elements & compounds) that organisms obtain and use for maintaining life.
Grade ix, Biology Notes Unit 8 for kpk pdf downloads
Types:
i. Autotrophic nutrition:
The nutrition of those organisms which prepare their own food is called Autotrophic Nutrition.
ii. Heterotrophic Nutrition:
The nutrition of those organisms which cannot prepare their own food and depends on other organisms for food is called Heterotrophic Nutrition.
Q2: Define Nutrient and its types?
Ans: Nutrient:
Definition:
Nutrients are the materials (elements & compounds) that organisms obtain and use for
maintaining life.
Types:
There are two types of nutrients.
i. Macronutrients:
The nutrients which are required in large amount for body are known as macronutrients.
Examples: Carbon, oxygen, calcium etc.
ii. Micronutrients:
The nutrients which are required in large amount for body are known as macronutrients.
Example: Zinc, sodium, Boron etc.
Importance of nutrients:
- It constitutes a source of energy for organisms.
- It provides a building material for growth and development.
- It regulates various body functions.
