NCERT Solutions Class 9 Science Chapter 6 - Tissues

Tissues – Important Questions with Answers

1. What is a tissue?
Answer: A tissue is a group of similar cells that perform a specific function.

2. Name the two types of plant tissues.
Answer: Meristematic tissue and Permanent tissue.

3. What is meristematic tissue?
Answer: Meristematic tissue consists of actively dividing cells found in growing parts of the plant.

4. Name the types of meristematic tissues based on location.
Answer:

• Apical meristem

• Lateral meristem

• Intercalary meristem

5. What is the function of apical meristem?
Answer: It helps in the growth of stems and roots at their tips.

6. What is permanent tissue?
Answer: Permanent tissue is made of mature cells that have lost the ability to divide and perform specific functions.

7. Name two types of permanent tissues.
Answer:

• Simple permanent tissue

• Complex permanent tissue

8. Give examples of simple permanent tissues.
Answer: Parenchyma, Collenchyma, and Sclerenchyma.

9. What is parenchyma?
Answer: Parenchyma is a living, simple permanent tissue that stores food and performs photosynthesis.

10. What is collenchyma and its function?
Answer: Collenchyma is a living tissue that provides flexibility and mechanical support to plants.

11. What is sclerenchyma?
Answer: Sclerenchyma is a dead tissue that provides strength and rigidity to the plant.

12. What are complex permanent tissues?
Answer: Tissues made of different types of cells working together for a common function, e.g., Xylem and Phloem.

13. Name the components of xylem.
Answer: Tracheids, Vessels, Xylem parenchyma, and Xylem fibres.

14. What is the main function of xylem?
Answer: To transport water and minerals from roots to different parts of the plant.

15. Name the components of phloem.
Answer: Sieve tubes, Companion cells, Phloem parenchyma, and Phloem fibres.

16. What is the main function of phloem?
Answer: To transport food from leaves to other parts of the plant.

17. What is the basic unit of nervous tissue?
Answer: Neuron.

18. Name the four types of animal tissues.
Answer:

• Epithelial tissue

• Connective tissue

• Muscular tissue

• Nervous tissue

19. What is epithelial tissue?
Answer: Epithelial tissue covers body surfaces and lines internal organs and cavities.

20. Name two types of epithelial tissues.
Answer:

• Squamous epithelium

• Columnar epithelium

21. What is connective tissue? Give examples.
Answer: Connective tissue connects and supports body parts.
Examples: Blood, Bone, Cartilage, Ligaments, Tendons.

22. What is muscular tissue?
Answer: Muscular tissue helps in movement by contraction and relaxation of muscle fibers.

23. Name three types of muscle tissues.
Answer:

• Striated (skeletal) muscle

• Smooth muscle

• Cardiac muscle

24. What is nervous tissue?
Answer: Nervous tissue carries messages between different parts of the body and the brain through nerve impulses.

25. How is cardiac muscle different from skeletal muscle?
Answer:

• Cardiac muscles are involuntary and found only in the heart, while skeletal muscles are voluntary and attached to bones.

• Cardiac muscles have branching fibers with intercalated discs.