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NCERT Textbook: Tissues in Action
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| 1. What are the main types of plant tissues? |  |
Ans. The main types of plant tissues are meristematic tissues and permanent tissues. Meristematic tissues are responsible for the growth of plants and consist of undifferentiated cells that can divide. Permanent tissues are differentiated and perform specific functions, and they can be further classified into simple (like parenchyma, collenchyma, and sclerenchyma) and complex tissues (like xylem and phloem).
| 2. What role do epithelial tissues play in animals? | |
Ans. Epithelial tissues in animals serve several crucial functions, including protection, absorption, secretion, and sensation. They cover body surfaces and line cavities and organs, forming a barrier that protects underlying structures. Epithelial tissues can be classified based on the number of layers (simple or stratified) and the shape of the cells (squamous, cuboidal, or columnar).
| 3. How do xylem and phloem differ in function? | |
Ans. Xylem and phloem are both types of complex tissues found in vascular plants, but they have different functions. Xylem is responsible for the transport of water and dissolved minerals from the roots to the rest of the plant, while phloem transports the products of photosynthesis (mainly sugars) from the leaves to other parts of the plant. This distinction is essential for the plant's growth and nutrient distribution.
| 4. What are connective tissues, and what are their functions? | |
Ans. Connective tissues are a diverse group of tissues in animals that provide support, binding, and protection to other tissues and organs. They include various types such as loose connective tissue, adipose tissue, blood, bone, and cartilage. Connective tissues play roles in storing energy, providing structural support, and facilitating the transport of substances throughout the body.
| 5. Why are meristematic tissues important for plant growth? | |
Ans. Meristematic tissues are essential for plant growth because they contain undifferentiated cells that have the ability to divide and differentiate into various types of cells. This capability allows plants to grow in length (apical meristems at the tips of roots and shoots) and in girth (lateral meristems). Without meristematic tissues, plants would not be able to grow and develop new organs necessary for survival.
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Document Description: NCERT Textbook: Tissues in Action for Class 9 2026 is part of Science Class 9 New NCERT 2026-27 (New Syllabus) preparation. The notes and questions for NCERT Textbook: Tissues in Action have been prepared according to the Class 9 exam syllabus. Information about NCERT Textbook: Tissues in Action covers topics like and NCERT Textbook: Tissues in Action Example, for Class 9 2026 Exam. Find important definitions, questions, notes, meanings, examples, exercises and tests below for NCERT Textbook: Tissues in Action.
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NCERT Textbook: Tissues in Action of Science Class 9 New NCERT 2026 is the updated edition as per the latest syllabus of the 2026-27, PDF available for download.
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