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Plant Growth and Development

Madhya Pradesh Board · Class 11 · Biology

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

105 questions80 flashcards5 concepts

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Key Topics to Revise

1

1. Growth and Its Nature

  • Growth is an irreversible permanent increase in size of an organ, its parts, or even a single cell.
  • Growth is accompanied by anabolic and catabolic metabolic processes that use energy.
  • Plants retain the capacity for unlimited growth throughout life because meristems keep adding new cells.
2

2. Phases of Growth and Growth Rates

  • The period of growth is divided into three phases: meristematic, elongation, and maturation.
  • Meristematic cells are rich in protoplasm, have large nuclei, thin primary cellulosic walls, and abundant plasmodesmata.
  • The elongation phase shows increased vacuolation, cell enlargement, and new cell wall deposition.
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3. Conditions for Growth and Differentiation

  • Water, oxygen, and nutrients are essential for growth.
  • Water is needed for cell enlargement and turgidity, which help extension growth.
  • Oxygen provides metabolic energy needed for growth activities.
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4. Plasticity and Factors Controlling Development

  • Plasticity is the ability of a plant to follow different developmental pathways in response to environment or life phase.
  • Heterophylly in cotton, coriander, and larkspur is an example of plasticity.
  • In buttercup, leaves formed in air differ from leaves formed in water, showing environmental plasticity.

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Full Notes

Key Concepts

Growth is an irreversible permanent increasePlants retain the capacity for unlimitedMeristems are regions of active cellGrowth occurs in three phasesIn arithmetic growth

Frequently Asked Questions

What are the important topics in Plant Growth and Development for Madhya Pradesh Board Class 11 Biology?
Plant Growth and Development covers several key topics that are frequently asked in Madhya Pradesh Board 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 — Madhya Pradesh Board Class 11 Biology?
Understand the core concepts first, then work through the 105 practice questions available for this chapter. Revise formulas and definitions regularly, and use flashcards for quick recall 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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