Anatomy of Flowering Plants — Class 11 Biology NCERT Solutions (Free)
Free step-by-step NCERT solutions for Class 11 Biology chapter "Anatomy of Flowering Plants" — 8 important questions with detailed answers for CBSE board exam preparation.
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TL;DR: Free step-by-step NCERT solutions for Class 11 Biology chapter "Anatomy of Flowering Plants" — 8 important questions with detailed answers for CBSE bo…
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Key Questions Covered:
- Define tissue and classify plant tissues.
- Describe the structure and function of parenchyma with its subtypes.
- Compare collenchyma and sclerenchyma tissues.
- Describe the structure of primary xylem and its components.
- Explain the structure of phloem tissue and name its components.
- Describe the structure of a typical dicot root with the arrangement of tissue…
- + 2 more questions in the full chapter
Solutions Summary:
| Question | Status |
|---|---|
| Define tissue and classify plant tissues. | ✓ Solved |
| Describe the structure and function of parenchyma with it… | ✓ Solved |
| Compare collenchyma and sclerenchyma tissues. | ✓ Solved |
| Describe the structure of primary xylem and its components. | ✓ Solved |
| Explain the structure of phloem tissue and name its compo… | ✓ Solved |
| Describe the structure of a typical dicot root with the a… | ✓ Solved |
Showing 6 of 8 questions
Q1: Define tissue and classify plant tissues.
A tissue is a group of similar cells organized to perform a specific function. Plant tissues are classified into two main categories:
1. Meristematic tissue (growing tissue):
- Cells are actively dividing; undifferentiated and totipotent.
- No intercellular spaces; cells densely packed.
- Types: Apical meristem (root and shoot tips), intercalary meristem (grass internodes), lateral meristem (cambium, cork cambium).
2. Permanent tissue (non-growing tissue):
- Cells have stopped dividing; differ...
Q2: Describe the structure and function of parenchyma with its subtypes.
Parenchyma is a simple permanent tissue composed of living, thin-walled cells. General characteristics:
- Polyhedral shape; loosely packed with intercellular spaces.
- Thin cellulose cell wall; large central vacuole.
- Metabolically active; retain capacity for mitosis.
Subtypes and functions:
1. Chlorenchyma (assimilatory parenchyma):
- Contains chloroplasts.
- Site of photosynthesis.
- Found in leaves and green stems.
2. Aerenchyma:
- Has prominent intercellular spaces.
- Provides buoyancy a...
Q3: Compare collenchyma and sclerenchyma tissues.
Collenchyma and sclerenchyma are both support tissues but differ:
Collenchyma:
- Living cells with thick, unevenly thickened cellulose walls.
- Thickening concentrated at corners; areas between are thin.
- Flexible; allows growth and bending.
- Chloroplasts often present (photosynthetically active).
- Found in growing regions like petioles, veins, young stems.
- Provides mechanical support without restricting growth.
Sclerenchyma:
- Dead cells at maturity; thick, lignified secondary walls.
- W...
Q4: Describe the structure of primary xylem and its components.
Primary xylem is the first-formed vascular tissue; it is complex, heterogeneous tissue composed of multiple cell types:
Components:
1. Tracheary elements (water-conducting cells):
a) Tracheids: Elongated cells with tapered ends; thick, lignified secondary walls with bordered pits; found in gymnosperms and ferns; water transport only (no sieve function).
b) Vessel elements (vessels): Shorter, wider cells arranged end-to-end forming long tubes; thick lignified walls with perforations (comp...
Q5: Explain the structure of phloem tissue and name its components.
Phloem is a complex vascular tissue responsible for translocation (transport) of food and other substances. Components:
1. Sieve elements (food-conducting cells):
a) Sieve cells: Found in gymnosperms; elongated with tapered ends; sieve areas (small pores) on all walls.
b) Sieve tube members: Found in angiosperms; short, wide cells; highly specialized with sieve plates (perforated transverse walls) connecting adjacent cells end-to-end, forming continuous sieve tubes.
- Sieve tube member...
Q6: Describe the structure of a typical dicot root with the arrangement of tissues (5-mark answer).
A typical dicot root structure from outside to center:
1. Root hair zone (piliferous layer):
- Outermost layer; composed of epidermal cells.
- Root hairs are outgrowths of epidermal cells; absorb water and minerals.
- Very short-lived (few days to weeks).
2. Cortex:
- Multiple layers of parenchyma cells; loosely packed with intercellular spaces.
- Functions: Storage of food, lateral transport of water and minerals.
- Outer layer = exodermis (cork-like cells).
3. Endodermis:
- Innermost layer ...
Showing 6 of 8 questions. Visit the full page for complete solutions.
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