Chapter 7: Structural Organisation in Animals – MCQs
🐾 Structural Organisation in Animals — MCQs
Part 1 (Q1–Q25)
Q1. The study of microscopic structure of animal tissues is called
A) Cytology
B) Histology ✅
C) Morphology
D) Anatomy
Explanation: Histology deals with the microscopic study of tissues.
Q2. The basic structural and functional unit of tissues is
A) Cell ✅
B) Nucleus
C) Organ
D) Organ system
Explanation: Cells form tissues, which organize into organs and systems.
Q3. Epithelial tissue is primarily meant for
A) Conduction
B) Protection ✅
C) Movement
D) Contraction
Explanation: Epithelial tissues cover body surfaces and protect underlying tissues.
Q4. The epithelium lining the kidney tubules is
A) Simple squamous
B) Cuboidal ✅
C) Columnar
D) Ciliated columnar
Explanation: Cuboidal epithelium lines kidney tubules and helps in absorption & secretion.
Q5. The epithelium lining the intestine with microvilli is
A) Squamous
B) Cuboidal
C) Columnar ✅
D) Ciliated
Explanation: Columnar epithelium with brush border (microvilli) aids absorption in intestines.
Q6. The epithelium lining the respiratory tract is
A) Ciliated columnar ✅
B) Stratified squamous
C) Cuboidal
D) Columnar
Explanation: Ciliated columnar epithelium helps in movement of mucus in respiratory tract.
Q7. Non-keratinized stratified epithelium is found in
A) Skin
B) Oesophagus ✅
C) Trachea
D) Kidney
Explanation: Oesophagus has non-keratinized stratified epithelium for protection against abrasion.
Q8. The epithelial tissue allowing diffusion in alveoli is
A) Cuboidal
B) Columnar
C) Simple squamous ✅
D) Stratified squamous
Explanation: Simple squamous epithelium is thin, allowing diffusion of gases.
Q9. The connective tissue with a matrix rich in calcium salts is
A) Cartilage
B) Bone ✅
C) Ligament
D) Tendon
Explanation: Bone matrix is rich in calcium salts & collagen, giving rigidity.
Q10. The connective tissue with a fluid matrix is
A) Cartilage
B) Bone
C) Blood ✅
D) Ligament
Explanation: Blood is a connective tissue with plasma as fluid matrix.
Q11. Ligaments connect
A) Bone to muscle
B) Bone to bone ✅
C) Muscle to muscle
D) Muscle to skin
Explanation: Ligaments connect bones to bones and provide flexibility.
Q12. Tendons connect
A) Muscle to bone ✅
B) Bone to bone
C) Muscle to muscle
D) Muscle to skin
Explanation: Tendons are inelastic structures connecting muscles to bones.
Q13. Cartilage is rich in
A) Chitin
B) Calcium
C) Chondrin ✅
D) Keratin
Explanation: Cartilage has chondrin matrix with chondrocytes in lacunae.
Q14. The contractile tissue in animals is
A) Epithelial tissue
B) Muscular tissue ✅
C) Nervous tissue
D) Connective tissue
Explanation: Muscle tissue contracts and relaxes to produce movement.
Q15. Striated muscle is also called
A) Smooth muscle
B) Skeletal muscle ✅
C) Cardiac muscle
D) Involuntary muscle
Explanation: Skeletal (striated) muscles are voluntary and attached to bones.
Q16. Smooth muscle is found in
A) Heart
B) Walls of intestine ✅
C) Bones
D) Diaphragm
Explanation: Smooth (unstriated, involuntary) muscles occur in visceral organs.
Q17. The muscle with intercalated discs is
A) Skeletal muscle
B) Smooth muscle
C) Cardiac muscle ✅
D) None
Explanation: Cardiac muscles have intercalated discs for synchronized contraction.
Q18. The functional unit of nervous system is
A) Axon
B) Dendrite
C) Neuron ✅
D) Neuroglia
Explanation: Neuron is the structural and functional unit of nervous tissue.
Q19. Myelin sheath is present around
A) Dendrites
B) Cell body
C) Axon ✅
D) Synapse
Explanation: Myelinated axons are covered by a myelin sheath for rapid conduction.
Q20. Neuroglial cells function as
A) Conduction units
B) Supportive cells ✅
C) Storage cells
D) Muscle fibers
Explanation: Neuroglia are supportive and nourishing cells for neurons.
Q21. In cockroach, blood is
A) Red
B) Colourless ✅
C) Blue
D) Green
Explanation: Cockroach blood lacks hemoglobin, hence colourless.
Q22. In cockroach, the excretion is carried out by
A) Nephridia
B) Malpighian tubules ✅
C) Kidneys
D) Coxal glands
Explanation: Malpighian tubules are excretory organs of insects like cockroach.
Q23. The respiratory organs of cockroach are
A) Lungs
B) Gills
C) Tracheae ✅
D) Book lungs
Explanation: Cockroach has tracheal system for respiration.
Q24. In cockroach, the heart is
A) Dorsal, tubular ✅
B) Ventral, tubular
C) Dorsal, chambered
D) Ventral, chambered
Explanation: Cockroach heart is dorsal, tubular, 13 chambers.
Q25. In cockroach, the mouthparts are of type
A) Piercing and sucking
B) Chewing and biting ✅
C) Siphoning
D) Lapping
Explanation: Cockroach mouthparts are chewing type with mandibles and maxillae.
🐾 Structural Organisation in Animals — MCQs
Part 2 (Q26–Q50)
Q26. The body wall of earthworm is covered externally by
A) Epidermis
B) Cuticle ✅
C) Mucous
D) Muscles
Explanation: The outer covering of earthworm is a thin, moist cuticle.
Q27. In earthworm, locomotion is aided by
A) Fins
B) Parapodia
C) Setae and muscles ✅
D) Hairs
Explanation: Earthworms move by contraction of muscles and use of setae for gripping soil.
Q28. The body segments of earthworm are called
A) Metameres ✅
B) Nodes
C) Somites
D) Annuli
Explanation: Earthworm body shows metameric segmentation into metameres.
Q29. The first segment of earthworm is
A) Clitellum
B) Prostomium ✅
C) Peristomium
D) Anus
Explanation: Prostomium is a lobe covering mouth; the actual mouth is on peristomium (1st segment).
Q30. Clitellum in earthworm is found in segments
A) 5–9
B) 14–16 ✅
C) 9–13
D) 25–30
Explanation: Clitellum (thick glandular band) lies in segments 14–16, secretes cocoon.
Q31. In earthworm, blood is
A) Colourless
B) Red due to hemoglobin in RBCs
C) Red due to hemoglobin dissolved in plasma ✅
D) Blue due to hemocyanin
Explanation: Earthworm blood is red, hemoglobin dissolved in plasma (no RBCs).
Q32. Excretion in earthworm is performed by
A) Nephridia ✅
B) Malpighian tubules
C) Green glands
D) Flame cells
Explanation: Earthworm excretes via nephridia present in each segment.
Q33. The nerve cord in earthworm is
A) Dorsal, solid
B) Ventral, solid, double ✅
C) Dorsal, hollow
D) Ventral, hollow
Explanation: Earthworm has a ventral, solid, double nerve cord.
Q34. The circulatory system in earthworm is
A) Open
B) Closed ✅
C) Absent
D) Pseudo-open
Explanation: Earthworm has a closed blood vascular system with blood vessels.
Q35. The excretory organ of prawn is
A) Nephridia
B) Malpighian tubules
C) Green glands ✅
D) Coxal glands
Explanation: Prawns excrete by green glands (antennal glands).
Q36. The respiratory organ of prawn is
A) Lungs
B) Gills ✅
C) Tracheae
D) Skin
Explanation: Prawns (crustaceans) respire through gills.
Q37. In cockroach, blood does not transport
A) Food
B) Waste
C) Oxygen ✅
D) Hormones
Explanation: Cockroach blood lacks hemoglobin, hence does not carry oxygen.
Q38. In cockroach, spiracles open into
A) Trachea ✅
B) Gills
C) Lungs
D) Heart
Explanation: Spiracles are openings into tracheal tubes for respiration.
Q39. In cockroach, fat body functions like
A) Kidney
B) Liver ✅
C) Heart
D) Lungs
Explanation: Fat body in cockroach acts like liver, storing fat and glycogen.
Q40. The reproductive organ of female cockroach is
A) Ovary ✅
B) Testis
C) Ootheca
D) Spermatheca
Explanation: Female cockroach has paired ovaries, each with ovarioles.
Q41. The egg case of cockroach is called
A) Cocoon
B) Ootheca ✅
C) Capsule
D) Cyst
Explanation: Female cockroach lays eggs enclosed in an ootheca.
Q42. The respiratory organs of earthworm are
A) Skin ✅
B) Gills
C) Lungs
D) Tracheae
Explanation: Earthworm respires through its moist skin (cutaneous respiration).
Q43. The heart of cockroach has
A) 4 chambers
B) 13 chambers ✅
C) 2 chambers
D) 5 chambers
Explanation: Cockroach heart is long tubular with 13 chambers.
Q44. In cockroach, mouthparts are of type
A) Piercing and sucking
B) Chewing and biting ✅
C) Lapping
D) Siphoning
Explanation: Cockroach has chewing mouthparts with mandibles and maxillae.
Q45. In earthworm, fertilization is
A) External
B) Internal ✅
C) Absent
D) Both
Explanation: Earthworms are hermaphrodite; fertilization occurs in the cocoon (internal).
Q46. The body of prawn is divided into
A) Head and trunk
B) Cephalothorax and abdomen ✅
C) Head, thorax, abdomen
D) Head and abdomen
Explanation: Prawn body = cephalothorax + abdomen.
Q47. The mouth of earthworm is present in segment
A) 1
B) 3
C) Peristomium (1st segment) ✅
D) Prostomium
Explanation: Mouth lies on the peristomium (1st segment), while prostomium is a pre-oral lobe.
Q48. In cockroach, the excretory organs are
A) Nephridia
B) Green glands
C) Malpighian tubules ✅
D) Flame cells
Explanation: Malpighian tubules in cockroach excrete nitrogenous wastes.
Q49. Earthworms are called “friends of farmers” because
A) They kill pests
B) They aerate soil and decompose organic matter ✅
C) They absorb water
D) They produce manure directly
Explanation: Earthworms improve soil fertility by aeration and humus formation.
Q50. The exoskeleton of cockroach is made of
A) Keratin
B) Chitin ✅
C) Collagen
D) Calcium carbonate
Explanation: Cockroach cuticle is made of chitin (a polysaccharide).
🐾 Structural Organisation in Animals — MCQs
Part 3 (Q51–Q75)
Q51. In cockroach, the mouth opening is surrounded by
A) Labium, mandibles, labrum, maxillae ✅
B) Tongue and jaws
C) Chelicerae
D) Antennae and palps
Explanation: Cockroach mouthparts are chewing type: labrum, mandibles, maxillae, and labium.
Q52. The sensory organs of cockroach are
A) Legs
B) Antennae, eyes, maxillary palps ✅
C) Cerci only
D) Claws
Explanation: Cockroach senses with antennae, compound eyes, ocelli, palps, cerci.
Q53. In cockroach, blood vascular system is
A) Closed
B) Open ✅
C) Absent
D) Double circulation
Explanation: Cockroach has an open circulatory system with blood flowing freely into body cavities.
Q54. The nervous system of cockroach is
A) Dorsal, hollow
B) Ventral, solid ✅
C) Dorsal, double
D) Absent
Explanation: Cockroach nervous system has ventral solid double nerve cord with ganglia.
Q55. Which type of eye is found in cockroach?
A) Simple eyes only
B) Compound eyes ✅
C) Both compound and ocelli ✅
D) Camera-type
Correct Answer: C) Both compound and ocelli
Explanation: Cockroach has compound eyes for vision and ocelli for light sensitivity.
Q56. The respiratory opening in cockroach is called
A) Spiracle ✅
B) Stigma
C) Pore
D) Gill slit
Explanation: Spiracles are external openings of tracheal system for respiration.
Q57. In earthworm, locomotion is aided by
A) Muscles and setae ✅
B) Fins
C) Cilia
D) Cilia and flagella
Explanation: Earthworm moves with help of circular & longitudinal muscles + setae.
Q58. In prawn, the exoskeleton is made of
A) Chitin with calcium salts ✅
B) Keratin
C) Collagen
D) Cutin
Explanation: Prawn cuticle has chitin hardened with calcium carbonate.
Q59. In cockroach, the last abdominal segment bears
A) Antennae
B) Cerci ✅
C) Ootheca
D) Spiracle
Explanation: Cerci are paired sensory appendages on the last abdominal segment.
Q60. In earthworm, reproductive organs are
A) Separate sexes
B) Hermaphroditic (bisexual) ✅
C) Male only
D) Female only
Explanation: Earthworm is hermaphrodite, but self-fertilization does not occur.
Q61. In cockroach, the male reproductive system has
A) One testis
B) Two testes ✅
C) Three testes
D) Four testes
Explanation: Male cockroach has paired testes, one on each side.
Q62. Sperms of earthworm are exchanged during
A) Self-fertilization
B) Copulation ✅
C) In cocoon
D) Fragmentation
Explanation: Two earthworms copulate and exchange sperms, which later fertilize in cocoon.
Q63. In prawn, the heart is located in
A) Abdomen
B) Cephalothorax ✅
C) Head
D) Tail
Explanation: Prawn heart is dorsal, muscular, and situated in cephalothorax.
Q64. The blood of prawn contains
A) Hemoglobin
B) Haemocyanin ✅
C) None
D) Chlorocruorin
Explanation: Prawn blood has haemocyanin (copper-based pigment) giving bluish colour.
Q65. In cockroach, female accessory glands secrete
A) Spermathecal fluid
B) Ootheca (egg case) material ✅
C) Silk
D) Enzymes
Explanation: Female cockroach accessory glands produce material for ootheca.
Q66. The number of spiracles in cockroach is
A) 6 pairs
B) 10 pairs ✅
C) 13 pairs
D) 5 pairs
Explanation: Cockroach has 10 pairs of spiracles (2 thoracic, 8 abdominal).
Q67. In earthworm, typhlosole increases
A) Circulation
B) Surface area for absorption ✅
C) Digestion of cellulose
D) Storage
Explanation: Typhlosole (in intestine) increases absorptive surface area.
Q68. The nerve ring in earthworm surrounds
A) Anus
B) Pharynx ✅
C) Gizzard
D) Intestine
Explanation: Nerve ring surrounds pharynx and connects cerebral & sub-pharyngeal ganglia.
Q69. In earthworm, calciferous glands are found in
A) Gizzard
B) Stomach (oesophagus) ✅
C) Pharynx
D) Intestine
Explanation: Calciferous glands neutralize humic acid in food.
Q70. Gizzard in earthworm helps in
A) Digestion by enzymes
B) Grinding food ✅
C) Absorption
D) Storage
Explanation: Gizzard is muscular, grinds soil and food particles.
Q71. In cockroach, fat body is analogous to
A) Brain
B) Liver ✅
C) Lungs
D) Kidneys
Explanation: Fat body stores fat & glycogen and helps detoxify, like a liver.
Q72. The body cavity of cockroach is
A) True coelom
B) Pseudocoelom
C) Haemocoel ✅
D) Blastocoel
Explanation: Cockroach has open circulation, body cavity is haemocoel.
Q73. The male accessory glands of cockroach are analogous to
A) Prostate gland ✅
B) Kidney
C) Pancreas
D) Testes
Explanation: Male cockroach accessory glands function like prostate glands.
Q74. The excretory matter of earthworm is
A) Urea
B) Ammonia
C) Uric acid
D) Urea + Ammonia + CO₂ (ureotelic + ammonotelic) ✅
Explanation: Earthworm is ammonotelic in water and ureotelic on land.
Q75. In cockroach, fertilized eggs are carried in
A) Spermatheca
B) Ootheca ✅
C) Uterus
D) Ovary
Explanation: Female cockroach encloses eggs in an ootheca until hatching.
🐾 Structural Organisation in Animals — MCQs
Part 4 (Q76–Q100)
Q76. The nervous system of earthworm is
A) Dorsal and hollow
B) Ventral and solid ✅
C) Absent
D) Diffused
Explanation: Earthworm has a ventral solid double nerve cord with ganglia.
Q77. In cockroach, tracheae open to outside through
A) Spiracles ✅
B) Lungs
C) Gills
D) Skin pores
Explanation: Cockroach tracheal tubes open externally through spiracles.
Q78. In earthworm, the clitellum secretes
A) Digestive enzymes
B) Cocoon wall ✅
C) Mucus only
D) Setae
Explanation: Clitellum secretes cocoon material for reproduction.
Q79. In cockroach, the female reproductive system contains
A) One ovary
B) Two ovaries ✅
C) Three ovaries
D) None
Explanation: Female cockroach has paired ovaries, each with ovarioles.
Q80. The locomotory organ of prawn is
A) Fins
B) Pleopods and walking legs ✅
C) Setae
D) Parapodia
Explanation: Prawns move with thoracic walking legs and abdominal pleopods.
Q81. The last abdominal segment of cockroach bears
A) Antennae
B) Cerci ✅
C) Wings
D) Ootheca
Explanation: Cerci are paired sensory appendages on the last abdominal segment.
Q82. The excretory organ of earthworm is
A) Malpighian tubules
B) Nephridia ✅
C) Green glands
D) Flame cells
Explanation: Earthworm excretes via nephridia present in every segment.
Q83. In cockroach, fat body is analogous to
A) Lungs
B) Liver ✅
C) Kidneys
D) Heart
Explanation: Fat body stores food reserves and functions like a liver.
Q84. The exoskeleton of prawn is made of
A) Chitin with calcium carbonate ✅
B) Keratin
C) Collagen
D) Cutin
Explanation: Prawn cuticle has chitin + calcium carbonate for hardness.
Q85. The blood vascular system of earthworm is
A) Open
B) Closed ✅
C) Absent
D) Haemocoel
Explanation: Earthworm has a closed circulatory system with vessels and capillaries.
Q86. In cockroach, salivary glands secrete
A) Digestive enzymes ✅
B) Silk
C) Waxes
D) Fatty acids
Explanation: Salivary glands in cockroach secrete enzymes (e.g., amylase) for digestion.
Q87. In prawn, blood pigment is
A) Hemoglobin
B) Haemocyanin ✅
C) Hemerythrin
D) None
Explanation: Prawns have copper-based haemocyanin, making blood bluish.
Q88. In earthworm, fertilization occurs in
A) Soil
B) Cocoon ✅
C) Clitellum
D) Body cavity
Explanation: Fertilization of gametes in earthworm occurs inside the cocoon.
Q89. In cockroach, sperms are stored in
A) Testes
B) Spermatheca ✅
C) Vas deferens
D) Ootheca
Explanation: Spermatheca in female cockroach stores sperms after copulation.
Q90. The sense organs of earthworm are
A) Eyes only
B) Taste buds
C) Light and touch receptors ✅
D) Antennae
Explanation: Earthworm has photoreceptors (light) and chemoreceptors (touch, taste).
Q91. The excretory product of cockroach is
A) Urea
B) Uric acid ✅
C) Ammonia
D) Water
Explanation: Cockroach is uricotelic, excretes uric acid.
Q92. In earthworm, blood corpuscles are
A) Absent
B) Colourless and nucleated ✅
C) Red
D) Binucleated
Explanation: Earthworm blood corpuscles are nucleated and colourless.
Q93. The alimentary canal of cockroach is divided into
A) Foregut, midgut, hindgut ✅
B) Mouth, stomach, intestine
C) Buccal cavity, stomach, anus
D) Crop, gizzard, intestine
Explanation: Cockroach alimentary canal = foregut (mouth → gizzard), midgut, hindgut.
Q94. In earthworm, septal nephridia are present on
A) Body wall
B) Septa between segments ✅
C) Blood vessels
D) Gut epithelium
Explanation: Septal nephridia lie on septa between body segments.
Q95. In cockroach, wings are present in
A) Males only
B) Females only
C) Both sexes ✅
D) None
Explanation: Both male and female cockroaches are winged.
Q96. Earthworm belongs to class
A) Insecta
B) Crustacea
C) Oligochaeta ✅
D) Arachnida
Explanation: Earthworm belongs to phylum Annelida, class Oligochaeta.
Q97. Prawn belongs to class
A) Insecta
B) Crustacea ✅
C) Arachnida
D) Annelida
Explanation: Prawn is a crustacean arthropod.
Q98. Cockroach belongs to class
A) Insecta ✅
B) Arachnida
C) Crustacea
D) Annelida
Explanation: Cockroach belongs to phylum Arthropoda, class Insecta.
Q99. Earthworm respires by
A) Lungs
B) Gills
C) Moist skin ✅
D) Spiracles
Explanation: Earthworm respires through moist skin (cutaneous respiration).
Q100. Which is called “farmers’ friend”?
A) Cockroach
B) Prawn
C) Earthworm ✅
D) Grasshopper
Explanation: Earthworm improves soil fertility and is called “friend of farmers.”
Structural organisation in animals MCQs for NEET, Class 11 structural organisation in animals questions with answers, CBSE biology structural organisation MCQs for board exams, NEET biology structural organisation chapter wise MCQs, Animal tissues and anatomy multiple choice questions for NEET, Structural organisation in animals NEET important questions with explanation, Solved structural organisation in animals MCQs for CBSE and NEET, NCERT structural organisation in animals MCQs for NEET preparation, NEET CBSE biology structural organisation chapter practice test, Structural organisation in animals objective questions for NEET and CBSE
