CBSE Class 11 Biology – Anatomy of Flowering Plants | Case-Based / Source-Based Questions (NCERT Based)

📘 Course & Examination Details

• Course: CBSE Class 11 Biology
• Unit: Unit II – Structural Organisation in Animals and Plants
• Chapter: Chapter 6 – Anatomy of Flowering Plants
• Question Type: Case-Based / Source-Based Questions
• Total Questions: 25
• Assessment Focus:
  • Tissue identification
  • Structural comparison
  • Application of anatomical concepts
• Exam Relevance:
  • CBSE Class 11 Annual Examination
  • Competency-based & case-study questions
  • NCERT-based internal assessments

🌱 Section A: Plant Tissues (Case-Based Questions 1–9)

Case 1

A plant part shows living cells with thin walls, large vacuoles, and intercellular spaces. Some cells contain chloroplasts.

Q1. Identify the tissue.
Answer: Parenchyma tissue.

Q2. Name the specialised form of this tissue containing chlorophyll.
Answer: Chlorenchyma.

Case 2

A student observes elongated cells with uneven thickening at the corners in a stem section.

Q3. Identify the tissue observed.
Answer: Collenchyma.

Q4. Mention one major function of this tissue.
Answer: Provides mechanical support and flexibility to growing plant parts.

Case 3

A tissue sample shows dead cells with thick, lignified walls and narrow lumen.

Q5. Name the tissue.
Answer: Sclerenchyma.

Q6. State one function of this tissue.
Answer: Provides rigidity and mechanical strength to plant organs.

Case 4

A conducting tissue contains vessels, tracheids, fibres, and parenchyma.

Q7. Identify the tissue.
Answer: Xylem.

Q8. What is the main function of this tissue?
Answer: Conduction of water and minerals from roots to aerial parts.

Case 5

A food-conducting tissue has sieve tube elements and companion cells.

Q9. Name the tissue.
Answer: Phloem.

🌿 Section B: Internal Structure of Root (Case-Based Questions 10–14)

Case 6

A root section shows radial vascular bundles with xylem and phloem arranged alternately and exarch xylem.

Q10. Identify the type of root.
Answer: Dicot root.

Case 7

A root shows numerous xylem bundles and a large central pith.

Q11. Identify the type of root.
Answer: Monocot root.

Case 8

A layer in root contains Casparian strips.

Q12. Name the layer.
Answer: Endodermis.

Q13. State its function.
Answer: Regulates the movement of water and minerals into vascular tissues.

Case 9

A student notices lateral roots emerging from a specific layer of root.

Q14. Name the layer.
Answer: Pericycle.

🌿 Section C: Internal Structure of Stem (Case-Based Questions 15–19)

Case 10

A stem shows vascular bundles arranged in a ring with cambium present.

Q15. Identify the type of stem.
Answer: Dicot stem.

Case 11

A stem section has scattered vascular bundles without cambium.

Q16. Identify the type of stem.
Answer: Monocot stem.

Case 12

The hypodermis of a stem consists of collenchyma.

Q17. What is the main function of this hypodermis?
Answer: Provides mechanical support and flexibility.

Case 13

A stem layer rich in starch grains is observed.

Q18. Name this layer.
Answer: Endodermis or starch sheath.

Case 14

A student compares vascular bundles and finds them closed.

Q19. What does this indicate about secondary growth?
Answer: Secondary growth will not occur.

🍃 Section D: Internal Structure of Leaf (Case-Based Questions 20–22)

Case 15

A leaf has palisade tissue on the upper side and spongy mesophyll below.

Q20. Identify the type of leaf.
Answer: Dorsiventral (dicot) leaf.

Case 16

A leaf shows bulliform cells and similar upper and lower surfaces.

Q21. Identify the type of leaf.
Answer: Isobilateral (monocot) leaf.

Case 17

A leaf rolls inward during water stress.

Q22. Which cells are responsible for this?
Answer: Bulliform cells.

🌳 Section E: Secondary Growth (Case-Based Questions 23–25)

Case 18

A plant stem increases in girth due to activity of a lateral meristem.

Q23. Name the meristem responsible.
Answer: Vascular cambium.

Case 19

A protective tissue replaces epidermis in older stems.

Q24. Name the tissue formed.
Answer: Periderm.

Case 20

Dark, non-functional wood is observed in the centre of a tree trunk.

Q25. Identify the tissue.
Answer: Heartwood.

✅ Final Notes

✔ Strictly based on NCERT Class 11 Biology
✔ Fully aligned with CBSE case-based competency questions
✔ Ideal for board exams & internal assessments
✔ Strong emphasis on tissue identification and application