Botany MCQs
Ace NEET, CSS, UPSC, PMS, PPSC, and NTS exams with Botany MCQs focused on plant physiology, reproduction, taxonomy, and ecology. Gain a solid foundation to excel in biology and competitive exams.
Q: Chemical element essential for chlorophyll synthesis
A) Nitrogen
B) Phosphorus
C) Magnesium
D) Potassium
✅ Correct Answer: C
Explanation: Magnesium is central to the chlorophyll molecule.
Q: Type of root system in monocots
A) Taproot
B) Fibrous root
C) Adventitious root
D) Haustorial root
✅ Correct Answer: B
Explanation: Monocots typically have fibrous root systems.
Q: Plant hormone that promotes cell elongation
A) Cytokinin
B) Auxin
C) Gibberellin
D) Ethylene
✅ Correct Answer: B
Explanation: Auxin stimulates elongation of plant cells.
Q: Tissue responsible for secondary growth
A) Parenchyma
B) Collenchyma
C) Xylem
D) Cambium
✅ Correct Answer: D
Explanation: Cambium produces secondary xylem and phloem.
Q: Leaf adaptation for reducing water loss
A) Thick cuticle
B) Large stomata
C) Thin epidermis
D) Broad surface
✅ Correct Answer: A
Explanation: Thick cuticle minimizes transpiration.