Life Processes in Plants Class 7 Long Question Answer

Life Processes in Plants Class 7 Long Question Answer

Life Processes in Plants Class 7 Long Question Answer

Question 1.

What are the essential components required for photosynthesis, and what is the overall equation representing this process?

Answer:

Photosynthesis requires sunlight, carbon dioxide, water, and chlorophyll. In this process, plants convert these raw materials into glucose and oxygen.

The overall equation for photosynthesis can be represented as:

Carbon dioxide + Water (in presence of chlorophyll and sunlight) → Glucose + Oxygen

Question 2.

Describe the significance of stomata in the process of photosynthesis and respiration in plants.

Answer:

Stomata are tiny pores located on the surface of leaves that help in gas exchange. During photosynthesis, stomata allow carbon dioxide to enter the leaf and oxygen to exit. In respiration, they enable oxygen uptake and carbon dioxide release. This dual function is essential for maintaining the plant's metabolic processes.

Question 3.

In an experiment to test the necessity of carbon dioxide for photosynthesis, what would be the expected results in a plant placed in sunlight with and without carbon dioxide?

Answer:

In the experiment, the plant placed in sunlight with carbon dioxide will produce starch, confirmed by the iodine test, turning blue-black. Conversely, the plant in sunlight without carbon dioxide will not produce starch, indicating that carbon dioxide is essential for photosynthesis and starch formation.