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Plant Growth and Development

CBSE · Class 11 · Biology

Quick revision notes for Plant Growth and Development — CBSE Class 11 Biology. Key concepts, formulas, and definitions for last-minute revision.

102 questions25 flashcards5 concepts

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Key Topics to Revise

1

Growth and Its Characteristics

  • Growth is an irreversible permanent increase in size of an organ, its parts, or individual cells
  • Plant growth is indeterminate - plants can grow throughout their life due to meristems
  • Growth occurs due to meristematic activity at root apex, shoot apex, and lateral meristems
2

Phases of Growth and Growth Rates

  • Three phases of growth: Meristematic, Elongation, and Maturation
  • Meristematic phase: Constantly dividing cells with large nuclei, thin cellulosic walls
  • Elongation phase: Increased vacuolation, cell enlargement, new cell wall deposition
3

Conditions for Growth and Differentiation

  • Essential conditions: Water, oxygen, nutrients, optimum temperature
  • Water provides medium for enzymatic activities and helps in cell enlargement
  • Turgidity helps in extension growth
4

Development and Plasticity

  • Development = Growth + Differentiation
  • Development includes all changes from seed germination to senescence
  • Plasticity: Ability to form different structures in response to environment or life phases

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Full Notes

Key Concepts

Growth is an irreversible permanent increaseGrowth occurs in three phasesGrowth can be arithmetic (constant rateDifferentiation is the process byPGRs are chemical substances that control

Frequently Asked Questions

What are the important topics in Plant Growth and Development for CBSE Class 11 Biology?
Plant Growth and Development covers several key topics that are frequently asked in CBSE Class 11 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
How to score full marks in Plant Growth and Development — CBSE Class 11 Biology?
Start by understanding all key concepts. Practise previous year questions from this chapter. Revise formulas and definitions regularly. Use flashcards for quick revision before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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