Question 1

Which of the following is the ultimate source of energy for all living organisms?

Accepted Answer

The sun is the ultimate source of energy for all living organisms. Plants capture solar energy through photosynthesis to make food, which is then consumed by animals.

Question 2

Green plants prepare their own food by a process called:

Accepted Answer

Green plants prepare their own food by a process called photosynthesis, using sunlight, water, and carbon dioxide in the presence of chlorophyll.

Question 3

Which pigment is responsible for the green colour of leaves?

Accepted Answer

Chlorophyll is the green pigment present in leaves that traps energy from sunlight during photosynthesis.

Question 4

The gas released during photosynthesis is:

Accepted Answer

Oxygen is released as a byproduct during the process of photosynthesis, which is essential for the survival of aerobic organisms.

Question 5

The mode of nutrition in which organisms make food themselves from simple substances is called:

Accepted Answer

Autotrophic nutrition is the mode of nutrition in which organisms synthesize their own food from simple inorganic substances like water and carbon dioxide.

Nutrition in Plants — CBSE Class 7 Science Important Questions & Revision Notes