Life Processes in Plants Class 7 Short Question Answer
hardLife Processes in Plants Class 7 Short Question Answer
Life Processes in Plants Class 7 Short Question Answer
Question 1.
What is the role of stomata in plants?
Answer:
Stomata are tiny pores on the surface of leaves that facilitate the exchange of gases. They allow carbon dioxide to enter for photosynthesis and oxygen to exit as a by-product.
Question 2.
How do plants transport water and nutrients?
Answer:
Plants use xylem to transport water and minerals from the roots to other parts. Phloem is responsible for transporting the food produced in the leaves to all parts of the plant.
Question 3.
What happens to glucose produced during photosynthesis?
Answer:
Glucose serves as an immediate source of energy for the plant. It can also be converted into starch for storage.
Question 4.
Explain the significance of chlorophyll in photosynthesis.
Answer:
Chlorophyll is crucial for photosynthesis as it captures sunlight, enabling the conversion of carbon dioxide and water into glucose. It also gives leaves their green colour, indicating areas where photosynthesis occurs.
Question 5.
What are the visible differences between a plant kept in sunlight and one kept in the dark?
Answer:
The plant in sunlight will be healthy, green, and may show signs of growth, while the one in the dark will be pale, elongated, and may exhibit stunted growth due to lack of photosynthesis.
Question 6.
How does the structure of leaves enhance photosynthesis?
Answer:
The broad and flat structure of leaves maximizes surface area for sunlight absorption. Additionally, the presence of stomata allows efficient gas exchange, facilitating the intake of carbon dioxide and release of oxygen.
Question 7.
What would happen if all organisms that perform photosynthesis disappeared?
Answer:
If all photosynthetic organisms vanished, oxygen levels would drop significantly, and carbon dioxide levels would rise. This would disrupt food chains and lead to the extinction of many organisms, including humans.