Tissues
Karnataka Board · Class 9 · Science
Quick revision notes for Tissues — Karnataka Board Class 9 Science. Key concepts, formulas, and definitions for last-minute revision.
Key Topics to Revise
Introduction to Tissues
- A tissue is a group of cells similar in structure and/or work together to achieve a particular function
- Unicellular organisms like Amoeba perform all functions with a single cell
- Multicellular organisms show division of labour - different cells perform different functions
Differences Between Plant and Animal Tissues
- Plants are stationary, animals are mobile - affects tissue structure
- Plants need more supportive tissue (often dead cells) to stay upright
- Animals need more living tissues as they consume more energy
Plant Tissues - Meristematic Tissue
- Growth occurs only in specific regions containing meristematic tissue
- Three types based on location: Apical, Lateral, Intercalary
- Apical meristem: at growing tips of stems and roots - increases length
Plant Tissues - Simple Permanent Tissue
- Formed when meristematic cells differentiate and lose ability to divide
- Parenchyma: most common, thin-walled living cells, stores food, large intercellular spaces
- Chlorenchyma: parenchyma with chlorophyll for photosynthesis
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Tissues covers several key topics that are frequently asked in Karnataka Board Class 9 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
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Sources & Official References
- Karnataka SSLC — kseeb.kar.nic.in
- Dept of Pre-University Education, Karnataka
- National Education Policy 2020 — education.gov.in
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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