Extra 30 short questions and answers from the chapter:6 "Tissues" for Class 9 CBSE Science:

1. What is a tissue? How is it different from a cell?

Answer:

A tissue is a

group of similar cells

working together to perform a specific function.

Difference:

A

cell

is the

basic unit of life

, while a

tissue

is a

group of cells

.

Cells

function independently, but

tissues work together

to perform complex functions.

 

2. What are the two main types of tissues in living organisms?

Answer:

Plant Tissues

– Found in plants (e.g., xylem, phloem).

Animal Tissues

– Found in animals (e.g., muscular, connective, nervous).

 

3. What is the function of meristematic tissue in plants?

Answer:

Meristematic tissue

consists of actively dividing cells.

Functions:

Helps in growth

– Found at root and shoot tips.

Replaces damaged cells

.

Forms new tissues

like xylem and phloem.

 

4. What are the three types of meristematic tissues?

Answer:

Apical meristem

– Found at the tips of roots and shoots, helps in growth.

Lateral meristem

– Found in stems, increases thickness (secondary growth).

Intercalary meristem

– Found at leaf and stem bases, helps in regrowth.

 

5. What are permanent tissues?

Answer:

Matured tissues

where cells

do not divide

further.

Types:

Simple permanent tissue

– Parenchyma, Collenchyma, Sclerenchyma.

Complex permanent tissue

– Xylem and Phloem.

 

6. What are simple permanent tissues? Name their types.

Answer:

Tissues made of one type of cell

.

Types:

Parenchyma

– Storage and photosynthesis.

Collenchyma

– Provides mechanical support.

Sclerenchyma

– Provides strength.

 

7. Explain the function of parenchyma in plants.

Answer:

Thin-walled, living cells

that perform:

Storage of food

(e.g., starch in potatoes).

Photosynthesis

(chlorenchyma).

Buoyancy in aquatic plants

(aerenchyma).

 

8. What is collenchyma tissue? Where is it found?

Answer:

Thick-walled, living cells

that provide

flexibility and support

.

Found in

leaf veins and stem edges

.

 

9. What is sclerenchyma? Why is it called a dead tissue?

Answer:

Thick-walled, dead cells

that provide

strength and rigidity

.

Cells have

lignin deposits

, making them

hard and impermeable

.

 

10. What are the components of xylem?

Answer:

Tracheid’s

– Water transport.

Vessels

– Water conduction.

Xylem

fibres

– Strength.

Xylem parenchyma

– Stores food.

 

11. What are the components of phloem?

Answer:

Sieve tubes

– Transport food.

Companion cells

– Support sieve tubes.

Phloem

fibres

– Strength.

Phloem parenchyma

– Stores food.

 

12. Differentiate between xylem and phloem.

Answer:

Feature	Xylem	Phloem
Function	Transports water	Transports food
Cell type	Dead cells	Living cells
Direction	Upward	Both directions

 

13. What is connective tissue? Give examples.

Answer:

Tissue that connects, binds, and supports

body parts.

Examples:

Blood, bone, cartilage, ligaments, tendons

.

 

14. What are the different types of connective tissues?

Answer:

Fluid connective tissue

– Blood, lymph.

Skeletal connective tissue

– Bone, cartilage.

Fibrous connective tissue

– Tendons, ligaments.

Adipose tissue

– Stores fat.

 

15. Differentiate between tendons and ligaments.

Answer:

Feature	Tendons	Ligaments
Connect	Muscle to bone	Bone to bone
Strength	Strong, non-elastic	Elastic

 

16. What is muscular tissue? Name its types.

Answer:

Tissue responsible for movement

.

Types:

Skeletal muscle

– Voluntary movement.

Smooth muscle

– Involuntary movement.

Cardiac muscle

– Found in the heart.

 

17. What are the characteristics of skeletal muscles?

Answer:

Striated

(striped appearance).

Multinucleated

.

Voluntary

.

Found in

arms, legs, face

.

 

18. What are the characteristics of smooth muscles?

Answer:

Non-striated

.

Uninucleate

.

Involuntary

.

Found in

intestines, blood vessels

.

 

19. What is cardiac muscle? Where is it found?

Answer:

Involuntary, striated muscle found in the heart

.

Helps in

pumping blood

.

 

20. What is epithelial tissue? Give types.

Answer:

Covers body surfaces

and

lines organs

.

Types:

Squamous

– Thin, flat (skin).

Cuboidal

– Cube-shaped (kidney tubules).

Columnar

– Tall cells (intestines).

 

21. What is the role of nervous tissue in animals?

Answer:

Nervous tissue

helps in

transmitting messages

in the body.

It consists of

neurons (nerve cells)

that carry electrical impulses.

It controls

body functions and responses

to stimuli.

Found in the

brain, spinal cord, and nerves

.

 

22. How does the structure of bone help in its function?

Answer:

Bone is a

hard connective

tissue

with

calcium and phosphorus

deposits.

It provides

support and shape

to the body.

It has

bone marrow

, which produces

blood cells

.

It acts as a

storage site for minerals

.

 

23. What are the functions of blood as a connective tissue?

Answer:

Transports oxygen and nutrients

to body cells.

Carries waste materials

to be removed.

Helps in

fighting infections

(WBCs).

Regulates

body temperature and pH balance

.

 

24. Why is adipose tissue important?

Answer:

Stores fat

for energy.

Acts as an

insulator

, maintaining body temperature.

Cushions organs

like the heart and kidneys.

Protects the body from

mechanical shocks

.

 

25. What is the function of cartilage in the body?

Answer:

Provides

flexibility and support

to body parts.

Reduces

friction between bones

in joints.

Forms structures like

ears, nose, and trachea

.

Acts as a

shock absorber

in vertebral discs.

 

26. What is the role of areolar tissue in animals?

Answer:

It

connects different tissues

and fills spaces between organs.

Provides

flexibility and strength

.

Protects organs by

cushioning them

.

Helps in

repair and healing of wounds

.

 

27. Where is ciliated epithelium found, and what is its function?

Answer:

Found in the

respiratory tract, fallopian tubes, and digestive tract

.

Has

hair-like cilia

that help in the movement of substances.

In the

trachea

, it helps in

removing dust and mucus

.

In the

fallopian tubes

, it helps in

moving the egg towards the uterus

.

 

28. Compare voluntary and involuntary muscles.

Answer:

Feature	Voluntary Muscles	Involuntary Muscles
Control	Under conscious control	Not under conscious control
Example	Skeletal muscles (arms, legs)	Smooth and cardiac muscles
Structure	Striated, multinucleated	Non-striated (smooth muscles)

 

29. Explain the importance of plant tissues in daily life.

Answer:

Xylem

helps in

transporting water

, essential for plant growth.

Phloem

transports food, supporting

agriculture and crop production

.

Parenchyma

stores food, found in

fruits and vegetables

.

Sclerenchyma

is used in

making ropes,

fibres

, and textiles

.

 

30. Why is tissue formation important in multicellular organisms?

Answer:

Tissues allow

division of

labour

, making processes efficient.

Helps in

growth and repair

of the body.

Supports

specialization

, where different tissues perform different functions.

Helps in

maintaining structure and function

of organs.