Plant Physiology (Botany) (Part-I)

Total Questions: 34

1. Which Indian scientist invented the instrument to measure the growth of plants? [S.S.C. Online Stenographer 13.09.2017 (Shift-I)]

Correct Answer: (b) Jagdish Chandra Bose
Solution:Jagdish Chandra Bose -
Sir Jagdish Chandra Bose invented the crescograph, an instrument used to measure the growth of plants.

2. The elements known as primary nutrients for plants- [S.S.C. Online Graduate Level (T-I) 6.09.2016 (Shift-II)]

Correct Answer: (a) Nitrogen, Phosphorus and Potassium
Solution:Nitrogen, Phosphorus and Potassium -
These three elements (N, P, K) are considered the primary macronutrients essential for plant growth.

3. By which process does water come out as water vapor from the leaf? [S.S.C. MTS (T-I) 19.09.2017 (Shift-III)]

Correct Answer: (a) Transpiration
Solution:Transpiration -
Transpiration is the process by which water exits the plant as water vapor, primarily through the leaves.

4. Tiny pores present on the surface of leaves are known as: [S.S.C. Online MTS (T-I) 22.10.2021 (Shift-III)]

Correct Answer: (d) Stomata
Solution:Stomata -
Stomata are the tiny pores present on the surface of leaves that facilitate gas exchange and transpiration.

5. Which part of the plant allows for the uptake of carbon dioxide and limits the loss of water due to evaporation? [S.S.C. Online MTS (T-I) 18.10.2021 (Shift-III)]

Correct Answer: (d) Stomata
Solution:Plants have tiny pore-forming structures on the surface of leaves called ‘stomata’. These stomata absorb carbon dioxide from the atmosphere and control the process of transpiration as per the requirement. As a result, the resulting water loss is limited.

6. Tiny pores present on the surface of leaves are known as: [S.S.C. Online C.H.S.L. (T-I) 13.08.2021 (Shift-III)]

Correct Answer: (b) Stomata
Solution:Plants have tiny pore-forming structures on the surface of leaves called ‘stomata’. These stomata absorb carbon dioxide from the atmosphere and control the process of transpiration as per the requirement. As a result, the resulting water loss is limited.

7. What are the small pores on the lower surface of the leaf called? [S.S.C. Online Constable GD 12.02.2019 (Shift-I)]

Correct Answer: (c) Stomata
Solution:Stomata -
Stomata are indeed the small pores typically found on the lower surface of the leaf.

8. Evaporation of water takes place in which part of plants? [S.S.C. Online CHSL (T-I) 21.01.2017 (Shift-I)]

Correct Answer: (b) Stomata
Solution:Stomata -
The evaporation of water during transpiration primarily occurs through the stomata on the leaves.

9. _____ are a group of chemicals that influence cell division and shoot formation. [S.S.C. Online CHSL (T-I) 22.01.2017 (Shift-I)]

Correct Answer: (a) Cytokinins
Solution:Cytokinins -
Cytokinins are plant hormones that promote cell division and shoot formation.

10. Rate of transpiration in a dorsiventral leaf is [S.S.C. Online MTS (T-I) 12.10.2017 (Shift-III)]

Correct Answer: (b) Greater at the lower surface
Solution:Greater at the lower surface -
In a dorsiventral leaf (a typical dicot leaf), there are usually more stomata on the lower surface, leading to a higher rate of transpiration there.