Question 1. A tissue is best defined as—
(a) a group of different organs working together
(b) a group of similar cells performing a specific function
(c) a single cell performing all life processes
(d) a group of organ systems
Answer: Correct option: (b) a group of similar cells performing a specific function
Explanation: A tissue is a group of similar cells that work together to perform a particular function.
Question 2. The division of labour in multicellular organisms means—
(a) all cells perform the same function
(b) different cells and tissues perform different functions
(c) only organs perform functions
(d) cells do not perform any function
Answer: Correct option: (b) different cells and tissues perform different functions
Explanation: In multicellular organisms, different cells and tissues become specialised for different functions, making the body more efficient.
Question 3. Which tissue helps plants grow in length?
(a) Lateral meristem
(b) Apical meristem
(c) Sclerenchyma
(d) Phloem
Answer: Correct option: (b) Apical meristem
Explanation: Apical meristem is present at root and shoot tips and helps in lengthwise growth.
Question 4. Lateral meristem is responsible for—
(a) growth in length
(b) growth in girth
(c) food transport
(d) protection
Answer: Correct option: (b) growth in girth
Explanation: Lateral meristem is arranged along the sides of the stem and increases its thickness.
Question 5. Intercalary meristem is commonly responsible for—
(a) growth of grass after cutting
(b) water transport
(c) food storage
(d) formation of blood cells
Answer: Correct option: (a) growth of grass after cutting
Explanation: Intercalary meristem is present near nodes and helps grasses regrow after cutting or grazing.
Question 6. Which of the following is a feature of meristematic cells?
(a) Thick lignified walls
(b) Large vacuoles
(c) Dense cytoplasm and large nucleus
(d) Dead cells
Answer: Correct option: (c) Dense cytoplasm and large nucleus
Explanation: Meristematic cells divide actively, so they have dense cytoplasm, thin walls and prominent nuclei.
Question 7. The process by which meristematic cells become specialised is called—
(a) transpiration
(b) differentiation
(c) diffusion
(d) respiration
Answer: Correct option: (b) differentiation
Explanation: Differentiation converts actively dividing cells into specialised permanent tissues.
Question 8. Permanent tissues are formed from—
(a) animal tissues
(b) meristematic tissues
(c) blood cells
(d) nervous tissue
Answer: Correct option: (b) meristematic tissues
Explanation: Some meristematic cells lose the ability to divide and become permanent tissues.
Question 9. The outermost protective layer of a plant is—
(a) xylem
(b) phloem
(c) epidermis
(d) collenchyma
Answer: Correct option: (c) epidermis
Explanation: Epidermis forms the outer covering of the plant body and protects it.
Question 10. Cuticle is made up of—
(a) lignin
(b) cutin
(c) pectin
(d) haemoglobin
Answer: Correct option: (b) cutin
Explanation: Cuticle is a waxy layer made of cutin that reduces water loss.
Question 11. Root hairs help in—
(a) food transport
(b) absorption of water and minerals
(c) photosynthesis
(d) blood clotting
Answer: Correct option: (b) absorption of water and minerals
Explanation: Root hairs increase the surface area of roots for absorption from soil.
Question 12. Stomata help in—
(a) gaseous exchange and transpiration
(b) only food storage
(c) only mechanical support
(d) increasing stem girth
Answer: Correct option: (a) gaseous exchange and transpiration
Explanation: Stomata are pores that allow exchange of gases and loss of water vapour.
Question 13. Which simple permanent tissue stores food?
(a) Parenchyma
(b) Sclerenchyma
(c) Xylem
(d) Phloem
Answer: Correct option: (a) Parenchyma
Explanation: Parenchyma is a living tissue that mainly stores food and may perform photosynthesis.
Question 14. Aerenchyma helps aquatic plants to—
(a) become hard
(b) float
(c) transport blood
(d) form annual rings
Answer: Correct option: (b) float
Explanation: Aerenchyma has air spaces that provide buoyancy to aquatic plants.
Question 15. Collenchyma provides—
(a) only water transport
(b) support and flexibility
(c) only food transport
(d) nerve impulse transmission
Answer: Correct option: (b) support and flexibility
Explanation: Collenchyma cells have unevenly thickened corners that help plant parts bend without breaking.
Question 16. Which tissue makes coconut husk hard and strong?
(a) Parenchyma
(b) Collenchyma
(c) Sclerenchyma
(d) Epidermis
Answer: Correct option: (c) Sclerenchyma
Explanation: Sclerenchyma has thick lignified walls and provides hardness and strength.
Question 17. Lignin is mainly deposited in—
(a) parenchyma
(b) sclerenchyma
(c) blood plasma
(d) epithelial tissue
Answer: Correct option: (b) sclerenchyma
Explanation: Lignin makes sclerenchyma cells thick, hard and rigid.
Question 18. Xylem transports—
(a) food from leaves
(b) oxygen in blood
(c) water and minerals
(d) nerve impulses
Answer: Correct option: (c) water and minerals
Explanation: Xylem transports water and minerals from roots to other parts of the plant.
Question 19. Phloem transports—
(a) food
(b) water only
(c) minerals only
(d) oxygen only
Answer: Correct option: (a) food
Explanation: Phloem transports food prepared in leaves to different parts of the plant.
Question 20. Which component of xylem is living?
(a) Tracheids
(b) Vessels
(c) Xylem fibres
(d) Xylem parenchyma
Answer: Correct option: (d) Xylem parenchyma
Explanation: Most xylem components are dead, but xylem parenchyma is living.
Question 21. Sieve tubes are part of—
(a) xylem
(b) phloem
(c) epidermis
(d) sclerenchyma
Answer: Correct option: (b) phloem
Explanation: Sieve tubes are phloem cells that transport food.
Question 22. The main function of companion cells is to—
(a) protect the stem
(b) control loading and unloading of sugars in sieve tubes
(c) form annual rings
(d) absorb water from soil
Answer: Correct option: (b) control loading and unloading of sugars in sieve tubes
Explanation: Companion cells support sieve tubes in food transport.
Question 23. Plant tissues are organised into how many tissue systems?
(a) Two
(b) Three
(c) Four
(d) Five
Answer: Correct option: (b) Three
Explanation: Plant tissue systems are dermal, ground and vascular tissue systems.
Question 24. Which animal tissue forms the outer covering of the body?
(a) Muscular tissue
(b) Nervous tissue
(c) Epithelial tissue
(d) Bone tissue
Answer: Correct option: (c) Epithelial tissue
Explanation: Epithelial tissue forms skin and lines internal organs.
Question 25. Epithelial cells are usually—
(a) loosely arranged
(b) closely packed
(c) dead and lignified
(d) surrounded by annual rings
Answer: Correct option: (b) closely packed
Explanation: Epithelial cells are closely packed with very little intercellular space.
Question 26. Thin epithelial tissue in lungs helps in—
(a) gas exchange
(b) bone formation
(c) food storage
(d) muscle contraction
Answer: Correct option: (a) gas exchange
Explanation: Thin epithelium allows rapid diffusion of oxygen and carbon dioxide.
Question 27. Blood is a type of—
(a) epithelial tissue
(b) connective tissue
(c) meristematic tissue
(d) nervous tissue
Answer: Correct option: (b) connective tissue
Explanation: Blood connects body parts by transporting nutrients, gases, hormones and wastes.
Question 28. The red colour of blood is due to—
(a) plasma
(b) platelets
(c) haemoglobin
(d) cartilage
Answer: Correct option: (c) haemoglobin
Explanation: Haemoglobin is an iron-rich protein in RBCs that gives blood its red colour.
Question 29. Platelets help in—
(a) oxygen transport
(b) blood clotting
(c) food transport in plants
(d) movement of bones
Answer: Correct option: (b) blood clotting
Explanation: Platelets help form clots at injury sites.
Question 30. Which connective tissue connects muscle to bone?
(a) Ligament
(b) Tendon
(c) Cartilage
(d) Plasma
Answer: Correct option: (b) Tendon
Explanation: Tendons connect muscles to bones and help in movement.
Question 31. Ligaments connect—
(a) muscle to bone
(b) bone to bone
(c) skin to muscle
(d) nerve to muscle
Answer: Correct option: (b) bone to bone
Explanation: Ligaments connect bones at joints and provide stability.
Question 32. Skeletal muscles are—
(a) involuntary and non-striated
(b) voluntary and striated
(c) found only in the heart
(d) dead cells
Answer: Correct option: (b) voluntary and striated
Explanation: Skeletal muscles are under conscious control and show light and dark bands.
Question 33. Smooth muscles are found in—
(a) heart only
(b) stomach and intestine
(c) xylem
(d) skull bones
Answer: Correct option: (b) stomach and intestine
Explanation: Smooth muscles are present in internal organs and help in involuntary movement.
Question 34. Cardiac muscles are found in—
(a) arms
(b) legs
(c) heart
(d) intestine
Answer: Correct option: (c) heart
Explanation: Cardiac muscles are found only in the heart and work rhythmically.
Question 35. The cells of nervous tissue are called—
(a) neurons
(b) platelets
(c) sieve tubes
(d) vessels
Answer: Correct option: (a) neurons
Explanation: Neurons receive, process and transmit messages in the body.
Question 36. Dendrites of a neuron help in—
(a) receiving signals
(b) transporting water
(c) blood clotting
(d) bending bones
Answer: Correct option: (a) receiving signals
Explanation: Dendrites receive messages from other neurons.
Question 37. The musculoskeletal system includes—
(a) only bones
(b) only muscles
(c) bones, muscles, joints, cartilage, tendons and ligaments
(d) only blood and nerves
Answer: Correct option: (c) bones, muscles, joints, cartilage, tendons and ligaments
Explanation: These structures together support movement, posture and protection.
Question 38. Which joint allows movement in many directions?
(a) Hinge joint
(b) Ball and socket joint
(c) Fixed joint
(d) Pivot joint
Answer: Correct option: (b) Ball and socket joint
Explanation: Ball and socket joints, such as the shoulder, allow movement in many directions.
Question 39. Skull bones are joined by—
(a) ball and socket joints
(b) hinge joints
(c) fixed joints
(d) pivot joints
Answer: Correct option: (c) fixed joints
Explanation: Fixed joints do not allow movement and protect the brain.
Question 40. The ability of a single plant cell to develop into a complete plant is called—
(a) transpiration
(b) totipotency
(c) clotting
(d) locomotion
Answer: Correct option: (b) totipotency
Explanation: Totipotency is the ability of a single plant cell to divide and form a complete plant under suitable conditions.
