Key Fact: Tissues

Tissues are groups of cells with similar structure and function, enabling plants to grow and animals to move, protect, and communicate.

1. Which tissue is responsible for plant growth?

a) Permanent tissue
b) Meristematic tissue
c) Xylem
d) Phloem

Correct Answer: b) Meristematic tissue

Explanation: Meristematic tissues have actively dividing cells, found in root and shoot tips, driving plant growth.

2. Where is apical meristem located?

a) Base of leaves
b) Tips of roots and shoots
c) Stem girth
d) Internodes

Correct Answer: b) Tips of roots and shoots

Explanation: Apical meristem, at root and shoot tips, promotes vertical growth of plants.

3. Which tissue lacks vacuoles?

a) Parenchyma
b) Collenchyma
c) Meristematic tissue
d) Sclerenchyma

Correct Answer: c) Meristematic tissue

Explanation: Meristematic cells lack vacuoles to maximize cell division efficiency.

4. Which tissue stores food in plants?

a) Sclerenchyma
b) Parenchyma
c) Xylem
d) Phloem

Correct Answer: b) Parenchyma

Explanation: Parenchyma, with thin-walled living cells, stores food in roots and fruits.

5. Collenchyma provides:

a) Rigidity
b) Flexibility and support
c) Water transport
d) Food transport

Correct Answer: b) Flexibility and support

Explanation: Collenchyma, with thickened corners, offers flexibility and support to young stems.

6. Which tissue has dead cells with lignified walls?

a) Parenchyma
b) Collenchyma
c) Sclerenchyma
d) Meristematic

Correct Answer: c) Sclerenchyma

Explanation: Sclerenchyma cells are dead, with lignified walls, providing strength (e.g., coconut husk).

7. Xylem primarily transports:

a) Food
b) Water and minerals
c) Hormones
d) Gases

Correct Answer: b) Water and minerals

Explanation: Xylem transports water and minerals from roots via tracheids and vessels.

8. Phloem is responsible for:

a) Water transport
b) Food transport
c) Gas exchange
d) Mechanical support

Correct Answer: b) Food transport

Explanation: Phloem transports sugars from leaves to other parts via sieve tubes.

9. The epidermis in plants is:

a) A transport tissue
b) A protective tissue
c) A growth tissue
d) A storage tissue

Correct Answer: b) A protective tissue

Explanation: The epidermis protects plants from water loss and pathogens.

10. Stomata are regulated by:

a) Companion cells
b) Guard cells
c) Sieve tubes
d) Tracheids

Correct Answer: b) Guard cells

Explanation: Guard cells control stomata opening for gas exchange and transpiration.

11. Cork tissue is rich in:

a) Lignin
b) Suberin
c) Cellulose
d) Pectin

Correct Answer: b) Suberin

Explanation: Cork cells, rich in suberin, prevent water and gas exchange in older plants.

12. Vascular bundles consist of:

a) Parenchyma and collenchyma
b) Xylem and phloem
c) Epidermis and cork
d) Meristematic and sclerenchyma

Correct Answer: b) Xylem and phloem

Explanation: Xylem and phloem form vascular bundles for nutrient and water transport.

13. Chlorenchyma is a type of:

a) Sclerenchyma
b) Parenchyma
c) Collenchyma
d) Meristematic tissue

Correct Answer: b) Parenchyma

Explanation: Chlorenchyma, with chloroplasts, is parenchyma that performs photosynthesis.

14. Aerenchyma aids in:

a) Photosynthesis
b) Buoyancy
c) Strength
d) Water transport

Correct Answer: b) Buoyancy

Explanation: Aerenchyma’s air spaces provide buoyancy in aquatic plants.

15. Lateral meristem increases:

a) Height
b) Girth
c) Leaf size
d) Root length

Correct Answer: b) Girth

Explanation: Lateral meristem, like cambium, increases stem and root girth.

16. Which tissue is found in animal skin?

a) Stratified squamous epithelium
b) Cuboidal epithelium
c) Columnar epithelium
d) Ciliated epithelium

Correct Answer: a) Stratified squamous epithelium

Explanation: Stratified squamous epithelium protects skin with multiple layers.

17. Which tissue aids diffusion in lungs?

a) Columnar epithelium
b) Squamous epithelium
c) Cuboidal epithelium
d) Ciliated epithelium

Correct Answer: b) Squamous epithelium

Explanation: Squamous epithelium’s thin, flat cells facilitate diffusion in lung alveoli.

18. Blood is a type of:

a) Epithelial tissue
b) Connective tissue
c) Muscular tissue
d) Nervous tissue

Correct Answer: b) Connective tissue

Explanation: Blood, with a fluid matrix (plasma), transports nutrients as a connective tissue.

19. Bone’s matrix is rich in:

a) Suberin
b) Calcium
c) Lignin
d) Pectin

Correct Answer: b) Calcium

Explanation: Bone’s hard matrix, rich in calcium and phosphorus, provides structural support.

20. Cartilage is found in:

a) Kidney tubules
b) Nose and ears
c) Blood vessels
d) Intestine lining

Correct Answer: b) Nose and ears

Explanation: Cartilage, a flexible connective tissue, is in the nose, ears, and joints.

21. Ligaments connect:

a) Muscle to bone
b) Bone to bone
c) Muscle to muscle
d) Bone to nerve

Correct Answer: b) Bone to bone

Explanation: Ligaments are elastic connective tissues connecting bones at joints.

22. Tendons connect:

a) Bone to bone
b) Muscle to bone
c) Muscle to nerve
d) Bone to nerve

Correct Answer: b) Muscle to bone

Explanation: Tendons are fibrous connective tissues linking muscles to bones.

23. Which muscle is voluntary?

a) Smooth muscle
b) Cardiac muscle
c) Striated muscle
d) None of these

Correct Answer: c) Striated muscle

Explanation: Striated (skeletal) muscles are voluntary, controlling limb movements.

24. Cardiac muscle is found in:

a) Limbs
b) Heart
c) Intestine
d) Kidney

Correct Answer: b) Heart

Explanation: Cardiac muscle, involuntary and branched, is exclusive to the heart.

25. Smooth muscle is:

a) Voluntary
b) Involuntary
c) Multinucleate
d) Branched

Correct Answer: b) Involuntary

Explanation: Smooth muscle, in organs like the intestine, is involuntary and uninucleate.

26. Nervous tissue is composed of:

a) Chondrocytes
b) Neurons
c) Osteocytes
d) Adipocytes

Correct Answer: b) Neurons

Explanation: Nervous tissue consists of neurons for rapid stimuli transmission.

27. A neuron consists of:

a) Cell body, axon, dendrites
b) Cell wall, nucleus, vacuole
c) Matrix, fibers, cells
d) Cilia, flagella, nucleus

Correct Answer: a) Cell body, axon, dendrites

Explanation: Neurons have a cell body, axon, and dendrites for signal transmission.

28. Which tissue has a basement membrane?

a) Connective tissue
b) Epithelial tissue
c) Muscular tissue
d) Nervous tissue

Correct Answer: b) Epithelial tissue

Explanation: Epithelial tissue rests on a basement membrane for support.

29. Ciliated epithelium is found in:

a) Skin
b) Respiratory tract
c) Blood vessels
d) Bone marrow

Correct Answer: b) Respiratory tract

Explanation: Ciliated epithelium moves mucus in the respiratory tract with cilia.

30. Adipose tissue is used for:

a) Water transport
b) Fat storage
c) Gas exchange
d) Signal transmission

Correct Answer: b) Fat storage

Explanation: Adipose tissue stores fat for energy and insulation.

31. Which tissue is multinucleate?

a) Smooth muscle
b) Cardiac muscle
c) Striated muscle
d) Nervous tissue

Correct Answer: c) Striated muscle

Explanation: Striated muscles are multinucleate, aiding voluntary movement.

32. Intercalary meristem is found at:

a) Root tips
b) Base of leaves
c) Stem girth
d) Shoot apex

Correct Answer: b) Base of leaves

Explanation: Intercalary meristem, at leaf bases or internodes, aids elongation.

33. Desert plants have a thick epidermis due to:

a) Lignin
b) Cutin
c) Suberin
d) Cellulose

Correct Answer: b) Cutin

Explanation: Cutin forms a waxy layer on the epidermis, reducing water loss.

34. Differentiation in plants leads to:

a) Cell division
b) Permanent tissues
c) Vacuole formation
d) Photosynthesis

Correct Answer: b) Permanent tissues

Explanation: Differentiation converts meristematic cells into specialized permanent tissues.

35. Which is a simple permanent tissue?

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

Correct Answer: c) Parenchyma

Explanation: Parenchyma is simple, with one cell type, unlike complex xylem and phloem.

36. Cuboidal epithelium is found in:

a) Lung alveoli
b) Kidney tubules
c) Skin
d) Intestine

Correct Answer: b) Kidney tubules

Explanation: Cuboidal epithelium supports secretion in kidney tubules.

37. Areolar tissue is a type of:

a) Epithelial tissue
b) Connective tissue
c) Muscular tissue
d) Nervous tissue

Correct Answer: b) Connective tissue

Explanation: Areolar tissue, loose and supportive, is found under the skin.

38. Which tissue performs photosynthesis?

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

Correct Answer: b) Chlorenchyma

Explanation: Chlorenchyma, a parenchyma type, contains chloroplasts for photosynthesis.

39. Companion cells support:

a) Tracheids
b) Sieve tubes
c) Guard cells
d) Fibers

Correct Answer: b) Sieve tubes

Explanation: Companion cells provide metabolic support to sieve tubes in phloem.

40. Which tissue lines the intestine?

a) Squamous epithelium
b) Columnar epithelium
c) Cuboidal epithelium
d) Stratified epithelium

Correct Answer: b) Columnar epithelium

Explanation: Columnar epithelium aids absorption and secretion in the intestine.

41. Tracheids are part of:

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

Correct Answer: b) Xylem

Explanation: Tracheids in xylem transport water and provide support.

42. Which tissue provides buoyancy in aquatic plants?

a) Aerenchyma
b) Sclerenchyma
c) Collenchyma
d) Xylem

Correct Answer: a) Aerenchyma

Explanation: Aerenchyma’s air spaces aid buoyancy in aquatic plants.

43. Osteocytes are found in:

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

Correct Answer: b) Bone

Explanation: Osteocytes are bone cells in the calcified matrix.

44. Which tissue forms glands?

a) Nervous tissue
b) Epithelial tissue
c) Connective tissue
d) Muscular tissue

Correct Answer: b) Epithelial tissue

Explanation: Epithelial tissue forms glands for secretion of hormones or enzymes.

45. Sieve tubes are part of:

a) Xylem
b) Phloem
c) Epidermis
d) Meristematic tissue

Correct Answer: b) Phloem

Explanation: Sieve tubes in phloem transport sugars.

46. Which muscle type is branched?

a) Striated muscle
b) Smooth muscle
c) Cardiac muscle
d) None of these

Correct Answer: c) Cardiac muscle

Explanation: Cardiac muscle is branched for synchronized heart contractions.

47. The epidermis is replaced by what in older plants?

a) Parenchyma
b) Cork
c) Collenchyma
d) Sclerenchyma

Correct Answer: b) Cork

Explanation: Cork, with suberin, replaces the epidermis in older plants.

48. Chondrocytes are found in:

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

Correct Answer: b) Cartilage

Explanation: Chondrocytes are cells in cartilage’s flexible matrix.

49. Which tissue has a fluid matrix?

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

Correct Answer: b) Blood

Explanation: Blood has a fluid matrix (plasma) for nutrient transport.

50. Which tissue is responsible for movement?

a) Epithelial tissue
b) Connective tissue
c) Muscular tissue
d) Nervous tissue

Correct Answer: c) Muscular tissue

Explanation: Muscular tissue, with contractile fibers, enables movement.

51. Vessels are found in:

a) Phloem
b) Xylem
c) Parenchyma
d) Collenchyma

Correct Answer: b) Xylem

Explanation: Vessels in xylem transport water and minerals efficiently.

52. Which tissue protects against pathogens?

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

Correct Answer: b) Epidermis

Explanation: The epidermis forms a barrier against pathogens and injury.

53. Which tissue has air spaces?

a) Sclerenchyma
b) Aerenchyma
c) Collenchyma
d) Cork

Correct Answer: b) Aerenchyma

Explanation: Aerenchyma’s air spaces aid buoyancy and gas exchange in aquatic plants.

54. Which tissue is found in blood vessels?

a) Squamous epithelium
b) Columnar epithelium
c) Cuboidal epithelium
d) Ciliated epithelium

Correct Answer: a) Squamous epithelium

Explanation: Squamous epithelium lines blood vessels for smooth blood flow.

55. Which tissue supports organs?

a) Epithelial tissue
b) Connective tissue
c) Muscular tissue
d) Nervous tissue

Correct Answer: b) Connective tissue

Explanation: Connective tissue, like areolar tissue, supports and binds organs.

56. Which tissue is spindle-shaped?

a) Striated muscle
b) Smooth muscle
c) Cardiac muscle
d) Nervous tissue

Correct Answer: b) Smooth muscle

Explanation: Smooth muscle cells are spindle-shaped and involuntary.

57. Which tissue transmits signals?

a) Epithelial tissue
b) Connective tissue
c) Muscular tissue
d) Nervous tissue

Correct Answer: d) Nervous tissue

Explanation: Nervous tissue, with neurons, transmits signals rapidly.

58. Which tissue is found in coconut husk?

a) Parenchyma
b) Collenchyma
c) Sclerenchyma
d) Meristematic

Correct Answer: c) Sclerenchyma

Explanation: Sclerenchyma’s lignified cells provide strength in coconut husk.

59. Guard cells are part of:

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

Correct Answer: c) Epidermis

Explanation: Guard cells in the epidermis regulate stomata.

60. Which tissue cushions joints?

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

Correct Answer: b) Cartilage

Explanation: Cartilage’s flexible matrix cushions joints.

61. Which tissue is cylindrical?

a) Smooth muscle
b) Cardiac muscle
c) Striated muscle
d) Nervous tissue

Correct Answer: c) Striated muscle

Explanation: Striated muscles are cylindrical and multinucleate.

62. Which tissue has a waxy coating?

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

Correct Answer: b) Epidermis

Explanation: The epidermis in desert plants has a waxy cutin coating.

63. Which tissue is uninucleate?

a) Striated muscle
b) Smooth muscle
c) Cardiac muscle
d) Both b and c

Correct Answer: d) Both b and c

Explanation: Smooth and cardiac muscles are uninucleate, unlike multinucleate striated muscles.

64. Which tissue is found in the spinal cord?

a) Epithelial tissue
b) Connective tissue
c) Muscular tissue
d) Nervous tissue

Correct Answer: d) Nervous tissue

Explanation: Nervous tissue, with neurons, is found in the spinal cord.

65. Which tissue is found in young stems?

a) Sclerenchyma
b) Collenchyma
c) Xylem
d) Phloem

Correct Answer: b) Collenchyma

Explanation: Collenchyma supports young stems with flexibility.

66. Which tissue transports oxygen?

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

Correct Answer: a) Blood

Explanation: Blood transports oxygen via red blood cells.

67. Which tissue is found in leaf veins?

a) Parenchyma
b) Xylem
c) Collenchyma
d) Sclerenchyma

Correct Answer: b) Xylem

Explanation: Xylem in leaf veins transports water to photosynthetic cells.

68. Which tissue is responsible for gas exchange?

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

Correct Answer: a) Epidermis

Explanation: The epidermis, with stomata, facilitates gas exchange in plants.

69. Which tissue is found in the brain?

a) Epithelial tissue
b) Connective tissue
c) Muscular tissue
d) Nervous tissue

Correct Answer: d) Nervous tissue

Explanation: Nervous tissue, with neurons, is found in the brain for signal processing.

70. Which tissue is found in seed coats?

a) Parenchyma
b) Collenchyma
c) Sclerenchyma
d) Meristematic

Correct Answer: c) Sclerenchyma

Explanation: Sclerenchyma’s hard cells protect seed coats.

71. Which tissue is involved in transpiration?

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

Correct Answer: c) Epidermis

Explanation: The epidermis, via stomata, regulates transpiration.

72. Which tissue is found in tendons?

a) Epithelial tissue
b) Connective tissue
c) Muscular tissue
d) Nervous tissue

Correct Answer: b) Connective tissue

Explanation: Tendons are fibrous connective tissues connecting muscles to bones.

73. Which tissue is found in fruits?

a) Sclerenchyma
b) Parenchyma
c) Collenchyma
d) Xylem

Correct Answer: b) Parenchyma

Explanation: Parenchyma stores food and water in fleshy fruits.

74. Which tissue is found in the heart?

a) Striated muscle
b) Smooth muscle
c) Cardiac muscle
d) Nervous tissue

Correct Answer: c) Cardiac muscle

Explanation: Cardiac muscle enables heart contractions.

75. Which tissue is found in the kidney?

a) Squamous epithelium
b) Cuboidal epithelium
c) Columnar epithelium
d) Ciliated epithelium

Correct Answer: b) Cuboidal epithelium

Explanation: Cuboidal epithelium supports secretion in kidney tubules.

76. Which tissue is found in nerves?

a) Epithelial tissue
b) Connective tissue
c) Muscular tissue
d) Nervous tissue

Correct Answer: d) Nervous tissue

Explanation: Nervous tissue, with neurons, is found in nerves.

77. Which tissue is found in woody stems?

a) Parenchyma
b) Collenchyma
c) Sclerenchyma
d) Meristematic

Correct Answer: c) Sclerenchyma

Explanation: Sclerenchyma provides strength in woody stems.

78. Which tissue is found in the trachea?

a) Squamous epithelium
b) Cuboidal epithelium
c) Columnar epithelium
d) Ciliated epithelium

Correct Answer: d) Ciliated epithelium

Explanation: Ciliated epithelium moves mucus in the trachea.

79. Which tissue stores fat?

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

Correct Answer: d) Adipose

Explanation: Adipose tissue stores fat for energy.

80. Which tissue is found in roots?

a) Epidermis
b) Xylem
c) Phloem
d) All of these

Correct Answer: d) All of these

Explanation: Roots contain epidermis (protection), xylem (water transport), and phloem (food transport).

81. Which tissue is found in the stomach?

a) Striated muscle
b) Smooth muscle
c) Cardiac muscle
d) Nervous tissue

Correct Answer: b) Smooth muscle

Explanation: Smooth muscle enables involuntary stomach contractions.

82. Which tissue is found in leaves?

a) Parenchyma
b) Collenchyma
c) Sclerenchyma
d) All of these

Correct Answer: d) All of these

Explanation: Leaves contain parenchyma (photosynthesis), collenchyma (support), and sclerenchyma (strength).

83. Which tissue is found in bones?

a) Epithelial tissue
b) Connective tissue
c) Muscular tissue
d) Nervous tissue

Correct Answer: b) Connective tissue

Explanation: Bone is a connective tissue with a calcified matrix.

84. Which tissue is found in the liver?

a) Squamous epithelium
b) Cuboidal epithelium
c) Columnar epithelium
d) Ciliated epithelium

Correct Answer: b) Cuboidal epithelium

Explanation: Cuboidal epithelium supports secretion in liver ducts.

85. Which tissue is found in stems?

a) Xylem
b) Phloem
c) Collenchyma
d) All of these

Correct Answer: d) All of these

Explanation: Stems contain xylem, phloem (transport), and collenchyma (support).

86. Which tissue is found in ligaments?

a) Epithelial tissue
b) Connective tissue
c) Muscular tissue
d) Nervous tissue

Correct Answer: b) Connective tissue

Explanation: Ligaments are elastic connective tissues.

87. Which tissue is found in the pancreas?

a) Squamous epithelium
b) Cuboidal epithelium
c) Columnar epithelium
d) Ciliated epithelium

Correct Answer: b) Cuboidal epithelium

Explanation: Cuboidal epithelium supports secretion in pancreatic ducts.

88. Which tissue is found in the esophagus?

a) Squamous epithelium
b) Cuboidal epithelium
c) Columnar epithelium
d) Ciliated epithelium

Correct Answer: a) Squamous epithelium

Explanation: Stratified squamous epithelium protects the esophagus.

89. Which tissue is found in the lungs?

a) Squamous epithelium
b) Cuboidal epithelium
c) Columnar epithelium
d) Ciliated epithelium

Correct Answer: a) Squamous epithelium

Explanation: Squamous epithelium aids diffusion in lung alveoli.

90. Which tissue is found in the spleen?

a) Epithelial tissue
b) Connective tissue
c) Muscular tissue
d) Nervous tissue

Correct Answer: b) Connective tissue

Explanation: Connective tissue supports the spleen’s structure.

91. Which tissue is found in the bark?

a) Parenchyma
b) Collenchyma
c) Cork
d) Meristematic

Correct Answer: c) Cork

Explanation: Cork, with suberin, forms protective bark in trees.

92. Which tissue is found in the bladder?

a) Squamous epithelium
b) Cuboidal epithelium
c) Columnar epithelium
d) Transitional epithelium

Correct Answer: d) Transitional epithelium

Explanation: Transitional epithelium allows bladder stretching.

93. Which tissue is found in tendons?

a) Epithelial tissue
b) Connective tissue
c) Muscular tissue
d) Nervous tissue

Correct Answer: b) Connective tissue

Explanation: Tendons are dense connective tissues that connect muscles to bones, providing strength and flexibility.

94. Which tissue is responsible for secondary growth in plants?

a) Apical meristem
b) Lateral meristem
c) Intercalary meristem
d) Parenchyma

Correct Answer: b) Lateral meristem

Explanation: Lateral meristem, such as vascular cambium, increases the girth of stems and roots, enabling secondary growth.

95. Which tissue is found in the lining of the mouth?

a) Squamous epithelium
b) Cuboidal epithelium
c) Columnar epithelium
d) Ciliated epithelium

Correct Answer: a) Squamous epithelium

Explanation: Stratified squamous epithelium lines the mouth, providing protection against mechanical stress.

96. Which tissue provides insulation in animals?

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

Correct Answer: c) Adipose tissue

Explanation: Adipose tissue stores fat, providing insulation and energy reserves in animals.

97. Which tissue is found in the xylem parenchyma?

a) Dead cells
b) Living cells
c) Sieve tubes
d) Companion cells

Correct Answer: b) Living cells

Explanation: Xylem parenchyma consists of living cells that store nutrients and aid in lateral water transport.

98. Which tissue is found in the salivary glands?

a) Squamous epithelium
b) Cuboidal epithelium
c) Columnar epithelium
d) Ciliated epithelium

Correct Answer: b) Cuboidal epithelium

Explanation: Cuboidal epithelium in salivary glands supports secretion of saliva.

99. Which tissue is responsible for bending of plant parts?

a) Sclerenchyma
b) Collenchyma
c) Xylem
d) Phloem

Correct Answer: b) Collenchyma

Explanation: Collenchyma, with unevenly thickened walls, provides flexibility for bending in young plant parts.

100. Which tissue is found in the retina?

a) Epithelial tissue
b) Connective tissue
c) Muscular tissue
d) Nervous tissue

Correct Answer: d) Nervous tissue

Explanation: Nervous tissue in the retina, with photoreceptor cells, processes visual signals.

Thought Box: Why Tissues Matter

Understanding tissues is key to biology, as they form the structural and functional units of plants and animals, driving growth, movement, and survival.

1. What are plant tissues?

Plant tissues are groups of cells with similar structure and function, like meristematic tissues for growth and permanent tissues for support or transport.

2. What are animal tissues?

Animal tissues include epithelial (covering), connective (support), muscular (movement), and nervous (signal transmission) tissues.

3. What is the role of meristematic tissue?

Meristematic tissue, found in root and shoot tips, is responsible for cell division and plant growth.

4. What is parenchyma tissue?

Parenchyma is a simple permanent tissue that stores food, performs photosynthesis (chlorenchyma), or aids buoyancy (aerenchyma).

5. What is the function of collenchyma?

Collenchyma provides flexibility and mechanical support to young stems and leaves, allowing bending without breaking.

6. What is sclerenchyma tissue?

Sclerenchyma consists of dead, lignified cells that provide strength, found in seed coats and coconut husks.

7. What is the role of xylem?

Xylem transports water and minerals from roots to other plant parts via tracheids and vessels.

8. What does phloem do?

Phloem transports sugars and nutrients from leaves to other plant parts through sieve tubes.

9. What is epithelial tissue?

Epithelial tissue covers surfaces, protects, and secretes, found in skin, intestine, and glands.

10. What is connective tissue?

Connective tissue supports and connects organs, including blood, bone, cartilage, and adipose tissue.

11. What are the types of muscular tissue?

Muscular tissues include striated (voluntary), smooth (involuntary), and cardiac (heart-specific, involuntary).

12. What is nervous tissue?

Nervous tissue, with neurons, transmits signals for coordination, found in the brain, spinal cord, and retina.

13. Why are stomata important?

Stomata, regulated by guard cells, facilitate gas exchange and transpiration in plants.

14. What is the role of adipose tissue?

Adipose tissue stores fat, provides insulation, and acts as an energy reserve in animals.

15. How do tendons and ligaments differ?

Tendons connect muscles to bones, while ligaments connect bones to bones, both being connective tissues.

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