Chapter: 3 – Tissues in Action
Maximum Marks: 50
Suggested Time: 1 Hour 30 Minutes

This Class 9 Science Exploration Chapter 3 Sample Paper 2 provides fresh practice questions based on “Tissues in Action.” The paper covers important concepts through different question formats, including tissue organisation, plant tissue functions, protective tissues, conducting tissues, animal tissues, muscle types, connective tissues, and nervous tissue. All questions are different from Sample Paper 1, and complete solutions are provided at the end.

Sample Paper 2

General Instructions

1. All questions are compulsory.
2. Read each question carefully before answering.
3. Draw neat and labelled diagrams wherever required.
4. Use appropriate scientific terminology.
5. Answer according to the marks allotted.

Section A — Objective Questions

10 × 1 = 10 Marks

Q1. Which tissue forms the outermost protective covering of young plant parts?

a) Epidermis
b) Xylem
c) Phloem
d) Pith

Q2. Which substance is commonly present in the walls of cork cells and makes them impermeable to water?

a) Cellulose
b) Suberin
c) Chlorophyll
d) Starch

Q3. Which plant tissue contains chloroplasts and can manufacture food?

a) Chlorenchyma
b) Sclerenchyma
c) Cork
d) Xylem

Q4. Which of the following is a component of phloem?

a) Vessel
b) Tracheid
c) Sieve tube
d) Fibre only

Q5. Which connective tissue cushions joints and provides flexible support?

a) Blood
b) Cartilage
c) Tendon
d) Adipose tissue

Q6. Which connective tissue attaches one bone to another?

a) Tendon
b) Ligament
c) Cartilage
d) Areolar tissue

Q7. Which muscle tissue has branching fibres and specialised connections between cells?

a) Skeletal muscle
b) Smooth muscle
c) Cardiac muscle
d) Areolar muscle

Q8. Which epithelial tissue is commonly associated with secretion in glands?

a) Glandular epithelium
b) Squamous epithelium
c) Ciliated epithelium
d) Stratified epithelium

Q9. Which structure of a neuron carries impulses away from the cell body?

a) Dendrite
b) Axon
c) Nucleus
d) Cell wall

Q10. Which tissue is mainly responsible for storing excess energy in the form of fat?

a) Adipose tissue
b) Bone
c) Cartilage
d) Blood

Section B — Very Short Answer Questions

5 × 2 = 10 Marks

Q11. Why do plants need specialised tissues even though they cannot move from one place to another?

Q12. What is the main function of the epidermis in plants? Mention one feature that helps it perform this function.

Q13. What is cork? Why does it provide protection to older plant parts?

Q14. What is areolar connective tissue? State one function.

Q15. Why is cardiac muscle considered different from skeletal muscle?

Section C — Short Answer Questions

4 × 3 = 12 Marks

Q16. Explain how stomata help a plant. What role do guard cells play?

Q17. Describe the main components of phloem and explain how they help in food transport.

Q18. Explain the differences between tendon, ligament and cartilage.

Q19. Describe the three main parts of a neuron and state the function of each.

Section D — Application-Based Questions

2 × 4 = 8 Marks

Q20. A plant growing in a dry region has a thick waxy covering on its leaves. The plant loses very little water through its surface.

Answer the following:

a) Name the protective tissue or covering involved.
b) What is the main function of this covering?
c) How does it help the plant survive in dry conditions?
d) Which tiny structures in the epidermis regulate gaseous exchange?

Q21. A football player injures a structure connecting a muscle to a bone. Another player suffers an injury to a structure connecting two bones at a joint.

Answer the following:

a) What is the first structure called?
b) What is the second structure called?
c) Which one is generally more flexible?
d) State the main function of both structures.

Section E — Long Answer Questions

2 × 5 = 10 Marks

Q22. Explain the protective tissues found in plants. Discuss the structure and functions of the epidermis and cork, and explain how they protect plants.

Q23. Explain skeletal, smooth and cardiac muscles on the basis of their structure, location and control. Give one function of each type.

SOLUTIONS

Section A — Answers

Q1. a) Epidermis

Q2. b) Suberin

Q3. a) Chlorenchyma

Q4. c) Sieve tube

Q5. b) Cartilage

Q6. b) Ligament

Q7. c) Cardiac muscle

Q8. a) Glandular epithelium

Q9. b) Axon

Q10. a) Adipose tissue

Section B — Solutions

Q11. Why do plants need specialised tissues?

Plants carry out many different activities, such as absorbing water, transporting substances, providing support, making food and protecting their surfaces.

Specialised tissues allow different groups of cells to perform these functions efficiently. This creates a division of labour within the plant.

Q12. Epidermis

The epidermis forms the outer protective covering of young plant parts.

It protects the plant against physical damage, infection and excessive water loss.

One important feature is that the outer surface may have a waxy cuticle, which reduces water loss.

Q13. Cork

Cork is a protective tissue that develops in older plant parts.

Its cells are generally dead and have walls containing suberin, making them relatively impermeable to water and gases.

It protects older stems and roots from physical damage, infection and excessive water loss.

Q14. Areolar Tissue

Areolar tissue is a loose connective tissue found between and around various organs and tissues.

It helps bind tissues together, fills spaces and provides support around organs.

Q15. Cardiac vs Skeletal Muscle

Cardiac muscle is found only in the heart and contracts involuntarily and rhythmically.

Skeletal muscles are generally attached to bones and are mainly under voluntary control.

Section C — Solutions

Q16. Stomata and Guard Cells

Stomata are tiny pores mainly present in the epidermis of leaves.

They help:

• allow carbon dioxide to enter for photosynthesis;
• allow oxygen to leave;
• regulate the loss of water vapour through transpiration.

Each stoma is surrounded by guard cells. Changes in the water content of guard cells alter their shape and control whether the stomatal pore opens or closes.

Q17. Phloem

Phloem is a complex permanent tissue responsible mainly for transporting food and other organic substances within a plant.

Its important components include:

• Sieve tubes: Conduct food substances.
• Companion cells: Help maintain and regulate sieve tubes.
• Phloem parenchyma: Performs storage and other functions.
• Phloem fibres: Provide mechanical support.

Phloem can transport food from regions where it is produced or stored to regions where it is required.

Q18. Tendon, Ligament and Cartilage

Tendon:
Connects a muscle to a bone. It helps transmit the force produced by a muscle to the bone.

Ligament:
Connects one bone to another at a joint. It helps stabilise the joint while allowing appropriate movement.

Cartilage:
A flexible connective tissue that provides support and cushioning. It is found in structures such as the nose, ear and at the surfaces of many joints.

Q19. Parts of a Neuron

A neuron generally has three important parts:

Cell body: Contains the nucleus and coordinates the basic activities of the neuron.

Dendrites: Receive signals from receptors or other neurons.

Axon: Carries nerve impulses away from the cell body towards another neuron, muscle or gland.

Together, these structures allow nervous tissue to receive and transmit information.

Section D — Solutions

Q20. Plant Adaptation to Dry Conditions

a) The epidermis with its waxy cuticle forms the protective outer covering involved.

b) Its main function is to protect the plant and reduce water loss.

c) The waxy cuticle acts as a barrier that reduces evaporation of water from the plant surface. This helps plants conserve water in dry environments.

d) Stomata regulate gaseous exchange and also influence water loss.

Q21. Sports Injuries

a) The structure connecting a muscle to a bone is a tendon.

b) The structure connecting one bone to another is a ligament.

c) A ligament is generally more flexible than a tendon.

d) A tendon transmits the force of muscle contraction to bones, while a ligament connects and stabilises bones at joints.

Section E — Solutions

Q22. Protective Tissues in Plants

Protective tissues form the outer covering of plants and help protect them from environmental conditions.

Epidermis

The epidermis is generally the outermost layer of young plant parts. Its cells are closely packed, forming a protective barrier.

The epidermis helps:

• protect against physical injury;
• prevent infection;
• reduce water loss;
• regulate gaseous exchange through stomata.

In many aerial plant parts, the epidermis is covered by a waxy cuticle, which reduces water loss.

Cork

Cork develops as a protective tissue in older stems and roots. Cork cells are generally dead and have walls containing suberin.

Suberin makes the cells relatively impermeable to water and gases.

Cork therefore helps:

• protect older plant parts;
• reduce water loss;
• prevent damage and infection;
• provide insulation against environmental conditions.

Thus, epidermis and cork are important protective tissues that help plants survive changing environmental conditions.

Q23. Types of Muscle Tissue

There are three major types of muscle tissue: skeletal, smooth and cardiac muscle.

1. Skeletal Muscle

Skeletal muscles are generally attached to bones. Their fibres are long and show visible striations.

They are mainly under voluntary control.

Function: They help produce movements such as walking, running and lifting objects.

2. Smooth Muscle

Smooth muscle cells are generally spindle-shaped and do not show visible striations.

They are found in the walls of internal organs such as the intestine, stomach and blood vessels.

They are involuntary.

Function: They help move substances through internal organs and regulate the diameter of structures such as blood vessels.

3. Cardiac Muscle

Cardiac muscle is found only in the heart. Its cells are branched and show striations, with specialised connections between neighbouring cells.

It is involuntary and contracts rhythmically.

Function: It produces the contractions that pump blood through the circulatory system.

Comparison

These three types of muscle tissue are specialised for different forms of movement and together help the body function efficiently.