Class 9 Science Exploration Solutions English Medium

NCERT Solutions Class 9 Science Exploration English Medium

Tissues in Action

Topic: Assignments - What Have You Learned?

Chapter 3. Tissues in Action

This assignment is based on the complete chapter and follows the latest CBSE competency-based pattern. It is designed to improve conceptual understanding, analytical ability and exam preparation.

Chapter Assignment

1. One Word Answer

1. A group of similar cells performing the same function.
2. Plant tissue responsible for growth.
3. Meristem present at the tip of roots and shoots.
4. Tissue that transports water and minerals.
5. Tissue that transports prepared food.
6. The living simple permanent tissue that stores food.
7. The dead tissue that provides mechanical strength.
8. The connective tissue that joins muscles to bones.
9. The connective tissue that joins one bone to another.
10. The structural and functional unit of the nervous system.

2. Fill in the Blanks

1. A tissue is a group of __________ cells.
2. Meristematic tissue is responsible for __________.
3. Parenchyma mainly stores __________.
4. Collenchyma provides __________ to plants.
5. Sclerenchyma cells are __________ at maturity.
6. Xylem transports __________ and minerals.
7. Phloem transports prepared __________.
8. Blood is a __________ tissue.
9. Cardiac muscles are found only in the __________.
10. Nerve impulses are transmitted by __________.

3. True or False

1. Meristematic cells divide continuously.
2. Parenchyma is a dead tissue.
3. Phloem transports water.
4. Sclerenchyma provides mechanical strength.
5. Epithelial tissue covers body surfaces.
6. Blood is a connective tissue.
7. Skeletal muscles work involuntarily.
8. Cardiac muscles are branched.
9. Neurons transmit nerve impulses.
10. Ligaments connect bone to bone.

4. Match the Following

5. Very Short Answer Questions

1. Define tissue.
2. Why do multicellular organisms need tissues?
3. Name the two main types of plant tissues.
4. What is differentiation?
5. State one function of parenchyma.
6. Why is collenchyma called a supporting tissue?
7. What is the main function of xylem?
8. Name the four main types of animal tissues.
9. What is the function of epithelial tissue?
10. What is a neuron?

6. Short Answer Questions

1. Explain the importance of division of labour in multicellular organisms.
2. Differentiate between meristematic tissue and permanent tissue.
3. Describe the structure and functions of parenchyma.
4. Write the characteristics of collenchyma.
5. Explain the functions of sclerenchyma.
6. Differentiate between xylem and phloem.
7. Explain the functions of epithelial tissue.
8. Describe the different types of connective tissues.
9. Differentiate between tendon and ligament.
10. Compare skeletal, smooth and cardiac muscles.

7. Long Answer Questions

1. Describe the classification of plant tissues with suitable examples.
2. Explain the structure and functions of simple permanent tissues.
3. Describe the structure and functions of xylem and phloem.
4. Explain the different types of animal tissues and their importance.
5. Describe the structure and functions of connective tissue.
6. Explain the different types of muscular tissues with suitable examples.
7. Describe the structure and functions of nervous tissue.
8. Differentiate between plant tissues and animal tissues.
9. Explain how different tissues work together in multicellular organisms.
10. Discuss the importance of tissues in plants and animals.

8. Case Study Questions

Case Study 1

A gardener cuts the tip of a plant. After a few days, new branches begin to grow from the sides of the stem.

1. Which tissue is responsible for the growth of the plant?
2. Which type of meristem is present at the tip of the shoot?
3. Why does growth continue after cutting the tip?
4. What is the importance of meristematic tissue?

Case Study 2

A farmer notices that a coconut shell is extremely hard, while the pulp inside is soft and stores food.

1. Which tissue makes the coconut shell hard?
2. Which tissue stores food inside the coconut?
3. State one function of sclerenchyma.
4. Why is parenchyma called a living tissue?

Case Study 3

A doctor explains that oxygen, nutrients and hormones are transported throughout the body by a fluid tissue.

1. Name the tissue.
2. To which category of animal tissue does it belong?
3. State two functions of this tissue.
4. Why is it called a connective tissue?

Case Study 4

A football player injures the tissue connecting his muscles to the bones during a match.

1. Which connective tissue is injured?
2. What is its function?
3. How is it different from a ligament?
4. Why is this tissue important for movement?

Case Study 5

A person quickly removes his hand after touching a hot utensil.

1. Which tissue carries the nerve impulse?
2. What is the structural and functional unit of this tissue?
3. Which tissue helps in the movement of the hand?
4. Why is coordination important in such situations?

9. Competency-Based Questions

1. Why do plants require both meristematic and permanent tissues?
2. How does the structure of parenchyma help in its function?
3. Why is sclerenchyma absent in young growing plant parts?
4. How do xylem and phloem work together in maintaining plant life?
5. Why is epithelial tissue considered a protective tissue?
6. How does blood act as a connective tissue?
7. Why are cardiac muscles different from skeletal muscles?
8. How do neurons help maintain body coordination?
9. Why is the division of labour important in multicellular organisms?
10. How does the structure of tissues determine their functions?

10. HOTS Questions

1. What would happen if plants had no meristematic tissue?
2. Why do aquatic plants contain aerenchyma while desert plants generally do not?
3. How would a plant be affected if xylem stopped functioning?
4. Why are bones hard but cartilage flexible, even though both are connective tissues?
5. What problems would arise if ligaments were replaced by tendons?
6. Why are smooth muscles unsuitable for voluntary movement?
7. How would the human body be affected if nervous tissue stopped transmitting impulses?
8. Explain why tissue specialisation is essential for large multicellular organisms.
9. How do different tissues work together to produce coordinated movement?
10. Do you think the structure of a tissue always determines its function? Justify your answer with suitable examples.

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