Knowledge Of Botany

Cross pollination

Multiple-choice questions (MCQs) on plant physiology:

1. Which of the following is responsible for the opening and closing of stomata?
a) Guard cells
b) Xylem cells
c) Phloem cells
d) Epidermal cells
**Answer: a) Guard cells**

2. What is the primary function of xylem in plants?
a) Transport of water and minerals
b) Transport of sugars
c) Protection of plant cells
d) Photosynthesis
**Answer: a) Transport of water and minerals**

3. Which hormone is responsible for the elongation of cells and growth of stems?
a) Gibberellin
b) Abscisic acid
c) Auxin
d) Cytokinin
**Answer: c) Auxin**

4. What is the process by which plants convert light energy into chemical energy?
a) Transpiration
b) Respiration
c) Photosynthesis
d) Photoperiodism
**Answer: c) Photosynthesis**

5. Where does the majority of photosynthesis occur in a plant cell?
a) Chloroplasts
b) Mitochondria
c) Nucleus
d) Vacuole
**Answer: a) Chloroplasts**

6. Which of the following is NOT a function of plant roots?
a) Absorption of water and minerals
b) Anchoring the plant
c) Photosynthesis
d) Storage of food reserves
**Answer: c) Photosynthesis**

7. Which of the following is a plant hormone involved in the response to stress and dormancy?
a) Auxin
b) Cytokinin
c) Gibberellin
d) Abscisic acid
**Answer: d) Abscisic acid**

8. What is the process by which water moves through a plant from roots to leaves and escapes as v***r through stomata?
a) Osmosis
b) Transpiration
c) Active transport
d) Translocation
**Answer: b) Transpiration**

9. Which pigment is responsible for the green color of plants?
a) Chlorophyll
b) Anthocyanin
c) Carotenoid
d) Xanthophyll
**Answer: a) Chlorophyll**

10. What is the main function of stomata in plant leaves?
a) Photosynthesis
b) Transpiration
c) Gas exchange
d) Anchoring
**Answer: c) Gas exchange**

The stem
Definition of stem
Stem Terminology
Stem Vasculature
Function
Type of stem
Form of stem
Surface of stem
Specialized stem.
Stem as a food

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