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Revision Notes

Plant Tissues and Anatomy

Maharashtra Board · Class 11 · Biology

Quick revision notes for Plant Tissues and Anatomy — Maharashtra Board Class 11 Biology. Key concepts, formulas, and definitions for last-minute revision.

44 questions24 flashcards5 concepts

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Key Topics to Revise

1

Meristematic Tissues

  • Meristematic tissues are groups of young, actively dividing cells that retain their ability to divide throughout plant life
  • Characteristics: Polyhedral/isodiametric shape, thin elastic cell walls made of cellulose, dense protoplasm with distinct nucleus, small or absent vacuoles, high metabolic rate
  • Classification by Origin: Primordial (embryonic), Primary (from primordial), Secondary (from permanent tissues during later growth)
2

Simple Permanent Tissues

  • Permanent tissues have lost the ability to divide and have acquired definite shape, size, and function
  • PARENCHYMA: Thin-walled, living cells with large vacuoles; functions include storage, photosynthesis, gaseous exchange; can dedifferentiate to form cambium
  • COLLENCHYMA: Living mechanical tissue with unevenly thickened cellulosic walls; provides flexibility and support to young stems and petioles; absent in monocot roots
3

Complex Permanent Tissues

  • Complex tissues are made of different types of cells working together as a single unit
  • XYLEM (Wood/Hadrome): Dead tissue conducting water and minerals upward; provides mechanical support
  • Xylem components: Tracheids (elongated, tapering ends), Vessels (wider lumen, perforated end walls), Xylem parenchyma (living, storage), Xylem fibers (mechanical support)
4

Tissue Systems

  • Three tissue systems based on position and function: Epidermal, Ground, and Vascular
  • EPIDERMAL SYSTEM: Outermost protective layer derived from protoderm
  • Epidermis features: Single layer, compactly arranged, waxy cuticle, stomata with guard cells

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Key Concepts

YoungMade of one type of cellsMade of different types of cellsIncrease in thickness of stemsThree coordinated systems

Frequently Asked Questions

What are the important topics in Plant Tissues and Anatomy for Maharashtra Board Class 11 Biology?
Plant Tissues and Anatomy covers several key topics that are frequently asked in Maharashtra 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 Tissues and Anatomy — Maharashtra Board Class 11 Biology?
Understand the core concepts first, then work through the 44 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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