Answer Key of tissue

 

Class 9 – Tissues (Hard Objective Questions with Answers)

1. Which of the following is a simple permanent tissue in plants?

→ (c) Collenchyma

Parenchyma, Collenchyma, Sclerenchyma = simple permanent; Xylem & Phloem = complex.

2. The thickening of cell wall at the corners is the characteristic of:

→ (b) Collenchyma

Collenchyma cells have uneven cellulose thickening at corners, provide flexibility.

3. Which xylem element is living?

→ (c) Xylem parenchyma

All others (tracheids, vessels, fibres) are dead; parenchyma is living.

4. Companion cells are found associated with:

→ (b) Phloem sieve tubes

They help in loading/unloading of food in sieve tubes.

5. Guard cells are a type of:

→ (d) Epidermal cells

Guard cells regulate opening and closing of stomata.

6. Cork cells are impervious to water due to deposition of:

→ (b) Suberin

Cork has suberin that makes it waterproof.

7. The protective tissue present on the surface of old woody stems is:

→ (b) Cork

Epidermis is replaced by cork in old stems.

8. Which tissue transports organic food in plants?

→ (b) Phloem

Phloem transports sugars from leaves to other parts.

9. Which among the following is NOT a component of xylem?

→ (b) Sieve tubes

Sieve tubes belong to phloem, not xylem.

10. Glandular epithelium is a modified form of:

→ (c) Epithelial tissue

Specialized to secrete substances.

11. Intercalary meristem is found at:

→ (c) Base of internodes and leaves

Helps in regrowth, e.g., grasses.

12. Which of the following connective tissues connects muscles to bones?

→ (c) Tendons

Tendons = muscle to bone, Ligaments = bone to bone.

13. Ligaments are made up of:

→ (c) Dense connective tissue

Very strong, slightly elastic, connects bones to bones.

14. The structural and functional unit of nervous tissue is:

→ (b) Neuron

Neuron transmits impulses.

15. Which muscle is involuntary, non-striated and spindle-shaped?

→ (b) Smooth muscle

Found in internal organs, involuntary in action.

16. Bone is a hard connective tissue due to deposition of:

→ (a) Calcium carbonate and calcium phosphate

These salts make bone hard and rigid.

17. Which connective tissue acts as a shock absorber between bones?

→ (b) Cartilage

Soft and flexible, cushions joints.

18. Which blood cells help in clotting?

→ (c) Platelets

Platelets release clotting factors.

19. The tissue which provides flexibility in plants is:

→ (b) Collenchyma

Provides mechanical support and flexibility.

20. The growth of plants in length is due to activity of:

→ (a) Apical meristem

Located at tips of roots and shoots, causes primary growth.

21. Nissl’s granules are found in:

→ (b) Neurons

Granules in neuron cell body, involved in protein synthesis.

22. In animals, stratified epithelium is mainly meant for:

→ (b) Protection

Many layers provide protection from mechanical injury.

23. Phloem fibres differ from xylem fibres in being:

→ (a) Living

Phloem fibres are living at maturity, xylem fibres are dead.

24. Which of the following tissues lacks intercellular space?

→ (b) Collenchyma

Cells are tightly packed, little or no intercellular space.

25. The muscle tissue present only in the walls of the heart is:

→ (c) Cardiac muscle

Involuntary, striated, branched, found only in heart.

---

✅ So the Answer Key (1–25) is:

1(c), 2(b), 3(c), 4(b), 5(d), 6(b), 7(b), 8(b), 9(b), 10(c),

11(c), 12(c), 13(c), 14(b), 15(b), 16(a), 17(b), 18(c), 19(b), 20(a),

21(b), 22(b), 23(a), 24(b), 25(c).