Class 11 Biology — Chapter 13: Plant Growth and Development
60 practice questions · 20 Easy · 20 Medium · 20 Hard
Practise Class 11 Biology Chapter 13, "Plant Growth and Development", with 60 NCERT-aligned multiple-choice questions. The set is split into 20 Easy, 20 Medium and 20 Hard questions, so you can warm up on the fundamentals and then push into the exam-level problems that separate top scorers in CBSE Board exams and NEET UG.
"Plant Growth and Development" is one of the chapters where diagram-based recall, terminology and NCERT line-by-line accuracy really pays off. Each MCQ on this chapter is timed and uses exam-grade marking (+2 correct, −1 wrong, 0 skipped), training the same accuracy-under-pressure that real papers demand. Every question carries a short explanation, so a wrong answer becomes a quick lesson rather than a dead end — the fastest way to close gaps before a test.
Use this chapter as targeted revision: attempt the Easy set first to confirm your basics on Plant Growth and Development, then move to Medium and Hard to test application and problem-solving. Your accuracy, streaks and XP save automatically, and the chapter feeds into your overall Class 11 Biology mastery score. A few sample questions are shown below; sign in free to practise all 60.
Key concepts: Plant Growth and Development (Class 11 Biology)
This chapter covers plant growth, differentiation and development, and the roles of the plant growth regulators (hormones).
- Growth & phases
- Growth is irreversible increase in size, occurring at meristems, with formative, elongation and maturation phases.
- Differentiation & dedifferentiation
- Cells specialise (differentiation); mature cells can regain division ability (dedifferentiation) and re-specialise (redifferentiation).
- Plant growth regulators
- Auxins, gibberellins, cytokinins (promoters) and abscisic acid, ethylene (inhibitor/regulators).
- Hormone roles
- Auxins (apical dominance, rooting), gibberellins (stem elongation), cytokinins (cell division), ABA (dormancy, stomatal closure), ethylene (fruit ripening).
- Photoperiodism & vernalisation
- Flowering responses to day length (photoperiodism) and to cold treatment (vernalisation).
💡 Exam tips for Plant Growth and Development
- Match each hormone to its signature effect (auxin→apical dominance, ABA→stress/dormancy, ethylene→ripening).
- Abscisic acid is the 'stress hormone' (closes stomata, induces dormancy) — it opposes the growth promoters.
Sample questions
Auxin promotes:
IAA — discovered via phototropism studies.
Sigmoid (S-shaped) growth curve has:
Classic three-phase growth curve.
Photoperiodism affects:
Long-day vs short-day plants.
Plant Growth and Development — FAQs
What are the key concepts in Class 11 Biology Plant Growth and Development?+
This chapter covers plant growth, differentiation and development, and the roles of the plant growth regulators (hormones). Key ideas include Growth & phases, Differentiation & dedifferentiation, Plant growth regulators, Hormone roles, Photoperiodism & vernalisation.
What does Class 11 Biology Chapter 13 (Plant Growth and Development) cover on XamBaaz?+
It covers 60 NCERT-aligned MCQs on "Plant Growth and Development" — 20 Easy, 20 Medium and 20 Hard — each with a timed quiz and an instant explanation, suitable for CBSE Board exams and NEET UG.
Are these "Plant Growth and Development" questions free to practise?+
Yes — sign in with Google to practise "Plant Growth and Development" free. Full unlimited access is ₹999/year (limited-time launch price), with no per-chapter charges.
How should I revise "Plant Growth and Development" for the exam?+
Start with the Easy quiz to confirm your fundamentals, then attempt Medium and Hard for application-level practice. Review each explanation, retry the questions you miss, and track your accuracy on this chapter until it is consistently high.
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