Tissues in Action Class 9 Worksheet with Answers Science Chapter 3

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Class 9 Tissues in Action Worksheet

Worksheet On Tissues in Action Class 9

Tissues in Action Worksheet Class 9

→ Tissue: A group of similar cells working together to perform a specific function.

→ Meristematic Tissue: Actively dividing plant tissue responsible for growth in different parts of the plant.

→ Apical Meristem: Tissue located at the tips of roots and shoots that increases the length of the plant.

→ Lateral Meristem: Tissue located on the sides of stems and roots that increases their thickness (girth).

→ Intercalary Meristem: Tissue located at the base of an internode or just above a node that helps plants regrow after cutting or grazing.

→ Differentiation: The process by which meristematic cells become specialised and form permanent tissues.

→ Permanent Tissue: Plant tissue made of cells that have lost the ability to divide and have become specialised to perform specific functions.

→ Epidermis: The outer protective layer of a plant.

→ Cuticle: A waxy layer of cutin covering the epidermis that reduces water loss and protects the plant.

→ Transpiration: Loss of water vapour from plants through stomat(a)

→ Stomata: Tiny pores on the surface of leaves that help in gaseous exchange and transpiration.

→ Transpiration pull: The pulling force created by transpiration that helps in the upward movement of water from roots to leaves through the xylem.

→ Supporting Tissues: Plant tissues that provide mechanical strength, support, and shape to the plant (e.g., parenchyma, collenchyma, sclerenchyma).

→ Parenchyma: A simple living plant tissue with thin walls that mainly stores food and helps in photosynthesis.

→ Tissue: A group of similar cells working together to perform a specific function.

→ Meristematic Tissue: Actively dividing plant tissue responsible for growth in different parts of the plant.

→ Apical Meristem: Tissue located at the tips of roots and shoots that increases the length of the plant.

→ Lateral Meristem: Tissue located on the sides of stems and roots that increases their thickness (girth).

→ Intercalary Meristem: Tissue located at the base of an internode or just above a node that helps plants regrow after cutting or grazing.

→ Differentiation: The process by which meristematic cells become specialised and form permanent tissues.

→ Permanent Tissue: Plant tissue made of cells that have lost the ability to divide and have become specialised to perform specific functions.

→ Epidermis: The outer protective layer of a plant.

→ Cuticle: A waxy layer of cutin covering the epidermis that reduces water loss and protects the plant.

→ Transpiration: Loss of water vapour from plants through stomat(a)

→ Stomata: Tiny pores on the surface of leaves that help in gaseous exchange and transpiration.

→ Transpiration pull: The pulling force created by transpiration that helps in the upward movement of water from roots to leaves through the xylem.

→ Supporting Tissues: Plant tissues that provide mechanical strength, support, and shape to the plant (e.g., parenchyma, collenchyma, sclerenchyma).

→ Parenchyma: A simple living plant tissue with thin walls that mainly stores food and helps in photosynthesis.

→ Collenchyma: Living tissue that provides flexibility and allows plant parts to bend without breaking.

→ Pectin: A natural chemical substance present in plant cell walls that thickens the corners of collenchyma cells and provides flexibility like rubber.

→ Sclerenchyma: A simple plant tissue made of dead cells with very thick, lignin-filled walls that make it hard and strong, found in stems, leaf veins, and hard seed and nut coverings.

→ Lignin: A hard chemical substance in plant cell walls that makes them strong, rigid, and woody.

→ Conducting Tissues: Complex plant tissues that transport water, minerals, and food throughout the plant (xylem and phloem).

→ Xylem: Tissue that transports water and minerals from roots to other parts of the plant.

→ Phloem: Tissue that transports food from leaves to all parts of the plant.

→ Sieve Tubes: Long, tube-like cells in phloem that transport food (sugars) in plants.

→ Companion Cells: Cells associated with sieve tubes that help in the loading and unloading of food. Dermal Tissue System: The outer protective covering of a plant that reduces water loss.

→ Ground Tissue System: The tissue forming the main body of the plant between dermal and conducting tissues.

→ Vascular Tissue System: The conducting tissue system made up of xylem and phloem.

→ Epithelial Tissue: Tissue that forms the outer covering of the body and lines internal organs. Connective Tissue: Tissue that connects and supports other tissues of the body.

→ Blood: A fluid connective tissue containing plasma, RBCs, WBCs, and platelets.

→ Bone: A hard, strong connective tissue forming the body’s framework.

→ Tendon: Connective tissue that joins muscles to bones.

→ Cartilage: A soft connective tissue that provides flexibility and cushioning.

→ Ligament: Connective tissue that joins bones to bones and limits movement.

→ Matrix: The material present between cells in connective tissue.

→ Muscular Tissue: Tissue that helps in the movement of body parts.

→ Voluntary Movement: Movement under conscious control.

→ Involuntary Movement: Movement that occurs automatically.

→ Skeletal Muscles: Muscles attached to bones that help in voluntary movements.

→ Smooth Muscles: Involuntary, non-striated muscles that control slow movements in internal organs.

→ Cardiac Muscles: Involuntary, striated muscles of the heart that contract rhythmically without fatigue. Nervous Tissue: Tissue that controls and coordinates body activities.

→ Neuron: A nerve cell that transmits messages.

→ Cell Body: The part of a neuron that contains the nucleus and controls cell activities.

→ Dendrites: Branch-like structures that receive signals from other neurons.

→ Axon: A long fibre that carries messages away from the cell body to axon terminals, which transmit messages to other cells.

→ Musculoskeletal System: System made up of bones, muscles, joints, tendons and ligaments that helps in movement and support.

→ Joint: Junction between two or more bones.

→ Ball-and-Socket Joint: Joint that allows movement in all directions (shoulder, hip).

→ Hinge Joint: Joint allowing movement in one direction only (elbow, knee).

→ Pivot Joint: Joint allowing rotational movement (neck).

→ Fixed Joint: Immovable joint providing protection (skull).

→ Skeletal System: Framework of bones that gives shape, support and protection to the body.

→ Backbone or Vertebral Column: A series of vertebrae that support the body, enable movement, and provide flexibility with cushioning discs.

→ Vertebrae: Small bones that make up the backbone.

Class 9 Science Exploration Chapter 3 Worksheet

Class 9 Science Tissues in Action Worksheet

A. Multiple-Choice Questions

Question 1.
If companion cells are damaged, what will be the immediate effect on the plant?
(a) Water transport will stop.
(b) Sugar transport in sieve tubes will be affected
(c) Photosynthesis will stop.
(d) Mechanical strength will decrease.

Question 2.
When you touch a hot object and quickly pull your hand away, which tissue is mainly responsible?
(a) Muscular tissue I
(b) Epithelial tissue
(c) Nervous tissue
(d) Connective tissue I

Question 3.
Why are ribs joined by cartilage?
(a) To make them hard
(b) To allow flexibility
(c) To increase weight
(d) To store minerals

Question 4.
Which part of the plant creates the pulling force for water movement?
(a) Roots
(b) Stem
(c) Leaves
(d) Flowers

Question 5.
Identify the correct statements about the tissue shown in the figure.

(a) Its main function is storage of food.
(b) It also performs photosynthesis in the green parts of the plants.
(c) It has thickened corners due to pectin deposition.
(d) Both a and b

Question 6.
Which statement correctly explains why meristematic cells lack vacuoles?
(a) They store excess water.
(b) They need space for cell division.
(c) They are dead cells.
(d) They perform photosynthesis.

Question 7.
Coconut husk fibres are hard and brittle mainly because they contain
(a) parenchyma cells
(b) collenchyma cells
(c) sclerenchyma cells
(d) epidermal cells.

Question 8.
Poses of Surya Namaskar protect the body from
(a) growth problems
(b) stiffness
(c) digestive problems
(d) breathing problems.

Question 9.
This question consists of an Assertion (A) and a Reason (R). Read the Assertion and Reason the appropriate answer.
Assertion (A): Xylem transports food in plants.
Reason (R): Xylem consists of tracheids, vessels, xylem parenchyma and xylem fibres.
(a) Both A and R are true, and R is the correct explanation of A.
(b) Both A and R are true, but R is not the correct explanation of A.
(c) A is true, but R is false.
(d) A is false, but R is true.

Question 10.
This question consists of an Assertion (A) and a Reason (R). Read the Assertion and Reason the appropriate answer.
Assertion (A): Cardiac muscles do not get fatigued easily.
Reason (R): Cardiac muscles work rhythmically throughout life.
(a) Both A and R are true, and R is the correct explanation of A.
(b) Both A and R are true, but R is not the correct explanation of A.
(c) A is true, but R is false.
(d) A is false, but R is true.

B. State True (T) or False (F).

Question 1.
Meristematic tissues can divide continuously.

Question 2.
Permanent tissues can divide actively.

Question 3.
Sclerenchyma cells are living and flexible.

Question 4.
Cartilage is harder than bone.

Question 5.
Smooth muscles are involuntary.

Question 6.
Nervous tissue helps in coordination and control.

Question 7.
Ball and socket joints allow movement in all directions.

Question 8.
Sipra Guha Mukherjee and S. C. Maheshwari developed a complete plant through anther culture.

C. Fill in the blanks.

Question 1.
Nervous tissue is made up of an organised network of _______ .

Question 2.
Cardiac muscles are specifically found in ______ .

Question 3.
_______ helps in increasing the length of plants.

Question 4.
The outer protective layer of plants is called _______.

Question 5.
The process of becoming specialised is called _______.

Question 6.
Xylem and phloem together form _______tissue system.

Question 7.
Annual rings are found in the _______ of trees.

D. Assign one word to the following.

Question 1.
Junctions between two or more bones that allow movement.

Question 2.
Connect bones to bones and prevent excessive movement.

Question 3.
Growth zones present at the tips of stems and roots.

Question 4.
A waxy layer in cells that reduces water loss and provides protection.

Question 5.
Spindle-shaped, non-striated muscle cells.

Question 6.
Non-flexible skeletal tissue.

E. Match the Columns.

Question 1.
Match the types of plant tissues given in Column I with their characteristics listed in Column II.

Column I	Column II
(i) Parenchyma	(a) Provides mechanical strength and flexibility
(ii) Collenchyma	(b) involved in photosynthesis and storage
(iii) Sclerenchyma	(c) Transports food in plants
(iv) Xylem	(d) Consists of dead cells with thickened walls

Question 2.
Match the images of the types of epithelial tissues given in Column I with their structural descriptions listed in Column II.

F. Identify whether the following muscles represent voluntary or involuntary movements, and match them accordingly.

G. Very Short Answer Type Questions

Question 1.
What is the function of stomata?

Question 2.
Name the part of the phloem with perforated walls.

Question 3.
What are vertebrae?

H. Short Answer Type Questions

Question 1.
Why are some annual rings wide and some narrow?

Question 2.
How will you identify cardiac muscles cells under a microscope?

Question 3.
What is the role of joints in the body?

I. Long Answer Type Questions

Question 1.
Explain permanent tissues and the process of differentiation.

Question 2.
Differentiate between bone and cartilage.

Question 3.
(i) Identify and name the structure shown in the given figure.

(ii) Name the parts labelled A to E.

(iii) Explain how this structure works.

Wonder Way

A. Give reasons for the following.

Question 1.
Neurons are long cells.

Question 2.
Muscles are necessary for the movement of bones.

Question 3.
Cartilage provides flexibility at joints.

Question 4.
Epithelial tissue forms a protective covering.

Question 5.
Fixed joints do not allow movement.

Question 6.
Xylem vessels are tubular in structure.

Question 7.
Smooth muscles are involuntary.

Question 8.
Grass appears after some time after being mowed or grazed by animals.

Question 9.
Aquatic plants float easily, while dry twigs break more easily compared to fresh ones.

Question 10.
Stem cells from a healthy person are used in bone marrow transplants to treat diseases like leukaemia and thalassemi(a)

B. Read the paragraph and answer the following questions.
Rohan was playing cricket when he accidentally got hit on the chest by a ball. After the incident, he felt pain while breathing and noticed that it was difficult to take deep breaths. His doctor explained that the ribs form a protective cage around vital organs. He also told Rohan that the ribs are connected to the spine at the back and to the sternum in the front with the help of cartilage.

Question 1.
Why was Rohan finding it difficult to breathe after the injury?

Question 2.
Which vital organs are protected by the rib cage?

Question 3.
Why is the flexibility of the rib cage important for breathing?

C. Some parts of our body can move easily in many directions, while others move only in a single direction. Justify the statement.

Learn By Doing

A. Observe a small plant or hedge in your surroundings and, if possible, trim the tip of a young stem under adult supervision. Over the next few days, note the changes in its growth, especially whether the growth in length stops and new branches begin to grow from the nodes. Also, observe grass that regrows after mowing. Based on these observations, identify the types of meristematic tissues responsible for growth in length and regeneration. Finally, think about the structure of meristematic cells and explain why they lack vacuoles and how this helps in rapid cell division.

Look at the given diagram and answer the following questions.

Question 1.
Identify and name the structure shown in the given figure.

Question 2.
Name the parts labelled P to U.

Question 3.
Give two examples of daily activities where part T helps in body movement

C. Identify diagrams (i) and (ii) and name the parts labelled in each. Also, explain how you identified each one, giving at least two reasons in the space given below.

D. Complete the flowchart given below:

Explore With Curiosity

A. Rlya and her classmates performed an experiment to study the growth of onion roots. They took two jars, A and B, and placed onion bulbs in water. In Jar A, the roots were left undisturbed, while in Jar B, the root tips were carefully cut after 4 days. They measured the length of the roots every day for 7 days and plotted a graph.

Now, answer the following questions.

Question 1.
What difference do you observe in the growth pattern of Jar A and Jar B?

Question 2.
Why did the roots in Jar A continue to grow?

Question 3.
What caused the roots in Jar B to stop growing after Day 4?

Question 4.
Which type of plant tissue is responsible for root growth?

B. While visiting a farm, Neha noticed some plants with unusual swollen growths on their stems. Worried, she asked the farmer about it. The farmer told her it was a disease, but also mentioned that scientists study such diseases to learn something useful.

Now, answer the following questions:
1. Why do plants develop tumour-like swellings in crown gall disease?
2. Why do scientists study plant diseases like the one Neha observed, and how can such studies be useful for improving plants?

C. Observe the given activities and write the names of the joints involved in each activity in the given table.

Suggested Activities

A. Visit a doctor, physiotherapist, or sports trainer and find out about ligament rupture, cartilage damage, and bone fractures. Prepare a short report on what causes these injuries and how they are treate(d) Also suggest lifestyle changes such as regular exercise, maintaining correct posture, and consuming calcium- and protein-rich foods to reduce the risk of such injuries.

B. Observe gardening practices like pruning, grafting, irrigation, and crop rotation. Explain how each method supports plant tissues, including meristems (for growth), conducting tissues (for transport), and supporting tissues (for strength). You may also draw labelled diagrams of plants showing these effects.

C. Learn five basic steps from any tribal or traditional dance form. Observe which joints (shoulder, elbow, knee, ankle) are used in each movement. Create a short dance or drama that shows how joints help in smooth body movement, and perform it in class or at a school assembly.

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