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Q5:
Name the three basic tissue systems in the flowering plants. Give the tissue names under each system.
Solution :
Definition of Basic Tissue Systems
Based on their structure and location in the plant body, the tissues of flowering plants are organized into three distinct systems: the Epidermal Tissue System, the Ground (Fundamental) Tissue System, and the Vascular (Conducting) Tissue System.
Step 1: Categorization and Composition
The following table delineates the tissue components associated with each system, as classified by plant anatomists [Per the Sach's classification of plant tissues]:
| Tissue System | Component Tissues/Structures |
|---|---|
| Epidermal Tissue System | Epidermal cells, stomata, trichomes, and hairs. |
| Ground (Fundamental) Tissue System | Parenchyma, Collenchyma, and Sclerenchyma cells (forming the cortex, pericycle, pith, and medullary rays). |
| Vascular (Conducting) Tissue System | Xylem (tracheids, vessels, xylem parenchyma, xylem fibers) and Phloem (sieve tube elements, companion cells, phloem parenchyma, phloem fibers). |
Step 2: Theoretical Justification of Systems
- Epidermal Tissue System: Acts as the outermost protective layer of the primary plant body. It regulates transpiration and gas exchange [Reference: Stomatal Physiology].
- Ground Tissue System: Constitutes the bulk of the plant body excluding the epidermis and vascular bundles. It provides structural support, storage, and photosynthetic capacity [Reference: Plant Cytology].
- Vascular Tissue System: Composed of complex tissues (xylem and phloem) that form vascular bundles, essential for the translocation of water, minerals, and organic solutes throughout the organism [Per the Cohesion-Tension Theory and Pressure Flow Hypothesis].
Visual Representation of Tissue Organization
Final Solution: The three basic tissue systems are the Epidermal Tissue System (consisting of epidermis and its appendages), the Ground Tissue System (consisting of parenchyma, collenchyma, and sclerenchyma), and the Vascular Tissue System (consisting of xylem and phloem).
More Questions from Class 11 Biology Anatomy of Flowering Plants EXERCISES
- Q1(a): Draw illustrations to bring out the anatomical difference between (a) Monocot root and Dicot root
- Q1(b): Draw illustrations to bring out the anatomical difference between (b) Monocot stem and Dicot stem
- Q2: Cut a transverse section of young stem of a plant from your school garden and observe it under the microscope. How would you ascertain whether it is a monocot stem or a dicot stem? Give reasons.
- Q3: The transverse section of a plant material shows the following anatomical features - (a) the vascular bundles are conjoint, scattered and surrounded by a sclerenchymatous bundle sheaths. (b) phloem parenchyma is absent. What will you identify it as?
- Q4: What is stomatal apparatus? Explain the structure of stomata with a labelled diagram.
- Q6: How is the study of plant anatomy useful to us?
- Q7: Describe the internal structure of a dorsiventral leaf with the help of labelled diagrams.
CBSE Solutions for Class 11 Biology Anatomy of Flowering Plants
Chapters in CBSE - Class 11 Biology
- The Living World
- Biological Classification
- Plant Kingdom
- Animal Kingdom
- Morphology of Flowering Plants
- Structural Organisation in Animals
- Cell – The Unit of Life
- Biomolecules
- Cell Cycle and Division
- Transport in Plants
- Mineral Nutrition
- Photosynthesis
- Respiration in Plants
- Plant Growth and Development
- Digestion and Absorption
- Breathing and Exchange of Gases
- Body Fluids and Circulation
- Excretory Products and Elimination
- Locomotion and Movement
- Neural Control and Coordination
- Chemical Coordination and Integration
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