Complete Structural Organisation in Animals Question Bank & Solutions (70 Questions)
Q1 of 70
NEET NCERT Line-by-Line
A tissue is best defined as:
(A)
A single cell
(B)
A group of similar cells with intercellular substance performing a function
(C)
An organ
(D)
A group of organs
Show Answer & NCERT Explanation
Correct Answer: (B) A group of similar cells with intercellular substance performing a function
Tissue = similar cells + intercellular substance with a common function.
Q2 of 70
NEET NCERT Line-by-Line
Which tissue has a free surface?
(A)
Connective
(B)
Epithelial
(C)
Muscular
(D)
Neural
Show Answer & NCERT Explanation
Correct Answer: (B) Epithelial
Epithelium always has a free surface.
Q3 of 70
NEET NCERT Line-by-Line
Squamous epithelium is found in:
(A)
Stomach lining
(B)
Alveoli and blood-vessel walls
(C)
Gland ducts
(D)
Bronchioles only
Show Answer & NCERT Explanation
Correct Answer: (B) Alveoli and blood-vessel walls
Thin squamous cells line alveoli and vessels for diffusion.
Q4 of 70
NEET NCERT Line-by-Line
Which epithelium lines the stomach and intestine?
(A)
Squamous
(B)
Cuboidal
(C)
Columnar
(D)
Ciliated
Show Answer & NCERT Explanation
Correct Answer: (C) Columnar
Columnar epithelium lines the stomach and intestine.
Q5 of 70
NEET NCERT Line-by-Line
Ciliated epithelium occurs in the:
(A)
Alveoli
(B)
Bronchioles and fallopian tubes
(C)
Tendons
(D)
Bone
Show Answer & NCERT Explanation
Correct Answer: (B) Bronchioles and fallopian tubes
Cilia move mucus/ova in bronchioles and fallopian tubes.
Q6 of 70
NEET NCERT Line-by-Line
Goblet cells are an example of:
(A)
A multicellular gland
(B)
A unicellular gland
(C)
An endocrine gland
(D)
Cartilage
Show Answer & NCERT Explanation
Correct Answer: (B) A unicellular gland
Goblet cells are unicellular (exocrine) glands.
Q7 of 70
NEET NCERT Line-by-Line
Endocrine glands are characterised by:
(A)
Secreting through ducts
(B)
Being ductless and secreting hormones
(C)
Producing saliva
(D)
Forming bone
Show Answer & NCERT Explanation
Correct Answer: (B) Being ductless and secreting hormones
Endocrine glands are ductless and secrete hormones.
Q8 of 70
NEET NCERT Line-by-Line
The junction that prevents leakage of substances is the:
(A)
Gap junction
(B)
Adhering junction
(C)
Tight junction
(D)
Synapse
Show Answer & NCERT Explanation
Correct Answer: (C) Tight junction
Tight junctions seal the tissue against leakage.
Q9 of 70
NEET NCERT Line-by-Line
Communication between adjacent cells occurs via:
(A)
Tight junctions
(B)
Adhering junctions
(C)
Gap junctions
(D)
Desmosomes only
Show Answer & NCERT Explanation
Correct Answer: (C) Gap junctions
Gap junctions allow cytoplasmic communication.
Q10 of 70
NEET NCERT Line-by-Line
The most abundant tissue in the body is:
(A)
Epithelial
(B)
Connective
(C)
Muscular
(D)
Neural
Show Answer & NCERT Explanation
Correct Answer: (B) Connective
Connective tissue is the most abundant and widely distributed.
Q11 of 70
NEET NCERT Line-by-Line
Which connective tissue is fluid?
(A)
Cartilage
(B)
Bone
(C)
Blood
(D)
Areolar
Show Answer & NCERT Explanation
Correct Answer: (C) Blood
Blood is a fluid connective tissue.
Q12 of 70
NEET NCERT Line-by-Line
Adipose tissue mainly functions to:
(A)
Conduct impulses
(B)
Store fat
(C)
Contract
(D)
Line ducts
Show Answer & NCERT Explanation
Correct Answer: (B) Store fat
Adipose tissue stores fat beneath the skin.
Q13 of 70
NEET NCERT Line-by-Line
A tendon connects:
(A)
Bone to bone
(B)
Muscle to bone
(C)
Muscle to muscle
(D)
Nerve to muscle
Show Answer & NCERT Explanation
Correct Answer: (B) Muscle to bone
Tendons join muscle to bone.
Q14 of 70
NEET NCERT Line-by-Line
A ligament connects:
(A)
Muscle to bone
(B)
Bone to bone
(C)
Skin to muscle
(D)
Cartilage to nerve
Show Answer & NCERT Explanation
Correct Answer: (B) Bone to bone
Ligaments join bone to bone.
Q15 of 70
NEET NCERT Line-by-Line
Cells of cartilage are called:
(A)
Osteocytes
(B)
Chondrocytes
(C)
Fibroblasts
(D)
Neurons
Show Answer & NCERT Explanation
Correct Answer: (B) Chondrocytes
Chondrocytes occupy lacunae in cartilage.
Q16 of 70
NEET NCERT Line-by-Line
Bone hardness is due to:
(A)
Elastin only
(B)
Calcium salts and collagen
(C)
Chitin
(D)
Cellulose
Show Answer & NCERT Explanation
Correct Answer: (B) Calcium salts and collagen
Calcium salts + collagen give bone strength.
Q17 of 70
NEET NCERT Line-by-Line
Intercalated discs are found in:
(A)
Skeletal muscle
(B)
Smooth muscle
(C)
Cardiac muscle
(D)
Tendons
Show Answer & NCERT Explanation
Correct Answer: (C) Cardiac muscle
Intercalated discs are unique to cardiac muscle.
Q18 of 70
NEET NCERT Line-by-Line
Fusiform (tapering) fibres without striations are:
(A)
Skeletal
(B)
Smooth
(C)
Cardiac
(D)
Neural
Show Answer & NCERT Explanation
Correct Answer: (B) Smooth
Smooth muscle fibres are fusiform and non-striated.
Q19 of 70
NEET NCERT Line-by-Line
Neuroglia make up roughly what fraction of neural tissue?
(A)
One-tenth
(B)
One-quarter
(C)
More than half
(D)
All of it
Show Answer & NCERT Explanation
Correct Answer: (C) More than half
Neuroglia form more than half the volume of neural tissue.
Q20 of 70
NEET NCERT Line-by-Line
Which organ contains all four tissue types?
(A)
Liver
(B)
Heart
(C)
Kidney
(D)
Skin
Show Answer & NCERT Explanation
Correct Answer: (B) Heart
The heart contains all four basic tissues.
Q21 of 70
NEET NCERT Line-by-Line
The earthworm clitellum lies over segments:
(A)
5–9
(B)
10–11
(C)
14–16
(D)
18–20
Show Answer & NCERT Explanation
Correct Answer: (C) 14–16
The clitellum covers segments 14–16.
Q22 of 70
NEET NCERT Line-by-Line
Earthworm blood glands occur on segments:
(A)
1–3
(B)
4, 5 and 6
(C)
10 and 11
(D)
14
Show Answer & NCERT Explanation
Correct Answer: (B) 4, 5 and 6
Blood glands lie on segments 4, 5 and 6.
Q23 of 70
NEET NCERT Line-by-Line
The earthworm has how many pairs of testes?
(A)
One
(B)
Two
(C)
Four
(D)
Ten
Show Answer & NCERT Explanation
Correct Answer: (B) Two
Two pairs of testes (segments 10 and 11).
Q24 of 70
NEET NCERT Line-by-Line
The female genital pore of the earthworm is on segment:
(A)
12
(B)
13
(C)
14
(D)
18
Show Answer & NCERT Explanation
Correct Answer: (C) 14
The single female pore is on segment 14.
Q25 of 70
NEET NCERT Line-by-Line
In the earthworm gut, the gizzard lies:
(A)
Before the pharynx
(B)
Between oesophagus and stomach
(C)
After the intestine
(D)
In the clitellum
Show Answer & NCERT Explanation
Correct Answer: (B) Between oesophagus and stomach
Order: oesophagus → gizzard → stomach.
Q26 of 70
NEET NCERT Line-by-Line
The typhlosole increases:
(A)
Locomotion
(B)
Absorptive surface of the intestine
(C)
Blood pressure
(D)
Reproduction
Show Answer & NCERT Explanation
Correct Answer: (B) Absorptive surface of the intestine
The typhlosole boosts intestinal absorption.
Q27 of 70
NEET NCERT Line-by-Line
The earthworm respires through:
(A)
Lungs
(B)
Gills
(C)
Trachea
(D)
Its moist body surface
Show Answer & NCERT Explanation
Correct Answer: (D) Its moist body surface
Gas exchange is through the moist skin.
Q28 of 70
NEET NCERT Line-by-Line
Which is NOT a type of earthworm nephridium?
(A)
Septal
(B)
Integumentary
(C)
Pharyngeal
(D)
Malpighian
Show Answer & NCERT Explanation
Correct Answer: (D) Malpighian
Malpighian tubules belong to the cockroach; the three nephridia are septal, integumentary, pharyngeal.
Q29 of 70
NEET NCERT Line-by-Line
The earthworm is:
(A)
Dioecious
(B)
Hermaphrodite
(C)
Asexual only
(D)
Parthenogenetic only
Show Answer & NCERT Explanation
Correct Answer: (B) Hermaphrodite
The earthworm is a hermaphrodite (bisexual).
Q30 of 70
NEET NCERT Line-by-Line
The cockroach belongs to the class:
(A)
Amphibia
(B)
Insecta
(C)
Arachnida
(D)
Crustacea
Show Answer & NCERT Explanation
Correct Answer: (B) Insecta
Periplaneta americana is an insect.
Q31 of 70
NEET NCERT Line-by-Line
The cockroach abdomen has how many segments?
(A)
6
(B)
8
(C)
10
(D)
13
Show Answer & NCERT Explanation
Correct Answer: (C) 10
The abdomen has 10 segments in both sexes.
Q32 of 70
NEET NCERT Line-by-Line
The forewings (tegmina) of the cockroach arise from the:
(A)
Prothorax
(B)
Mesothorax
(C)
Metathorax
(D)
Head
Show Answer & NCERT Explanation
Correct Answer: (B) Mesothorax
Tegmina arise from the mesothorax.
Q33 of 70
NEET NCERT Line-by-Line
Which is NOT a cockroach mouthpart?
(A)
Labrum
(B)
Mandible
(C)
Maxilla
(D)
Tympanum
Show Answer & NCERT Explanation
Correct Answer: (D) Tympanum
The tympanum is a frog ear structure, not a mouthpart.
Q34 of 70
NEET NCERT Line-by-Line
The cockroach gizzard bears how many chitinous teeth?
Show Answer & NCERT Explanation
Correct Answer: (C) 6
The gizzard has 6 chitinous teeth.
Q35 of 70
NEET NCERT Line-by-Line
Malpighian tubules in the cockroach are concerned with:
(A)
Digestion
(B)
Excretion
(C)
Respiration
(D)
Reproduction
Show Answer & NCERT Explanation
Correct Answer: (B) Excretion
Malpighian tubules carry out excretion (uric acid).
Q36 of 70
NEET NCERT Line-by-Line
The cockroach has how many pairs of spiracles?
(A)
6
(B)
8
(C)
10
(D)
12
Show Answer & NCERT Explanation
Correct Answer: (C) 10
There are 10 pairs of spiracles.
Q37 of 70
NEET NCERT Line-by-Line
Blood of the cockroach is called:
(A)
Plasma
(B)
Haemolymph
(C)
Lymph
(D)
Serum
Show Answer & NCERT Explanation
Correct Answer: (B) Haemolymph
In open circulation the body fluid is haemolymph.
Q38 of 70
NEET NCERT Line-by-Line
A cockroach can survive without its head for about:
(A)
A few minutes
(B)
One day
(C)
One week
(D)
One month
Show Answer & NCERT Explanation
Correct Answer: (C) One week
Distributed ganglia let it live ~a week headless.
Q39 of 70
NEET NCERT Line-by-Line
Mosaic vision in the cockroach is produced by:
(A)
A single lens
(B)
~2000 ommatidia
(C)
Nictitating membranes
(D)
Antennae
Show Answer & NCERT Explanation
Correct Answer: (B) ~2000 ommatidia
~2000 ommatidia create mosaic vision.
Q40 of 70
NEET NCERT Line-by-Line
The egg-case of the cockroach is the:
(A)
Cocoon
(B)
Ootheca
(C)
Spermatophore
(D)
Pupa
Show Answer & NCERT Explanation
Correct Answer: (B) Ootheca
Cockroach eggs are encased in an ootheca.
Q41 of 70
NEET NCERT Line-by-Line
Each cockroach ovary contains how many ovarioles?
Show Answer & NCERT Explanation
Correct Answer: (C) 8
Each ovary has 8 ovarioles.
Q42 of 70
NEET NCERT Line-by-Line
Cockroach development is:
(A)
Holometabolous
(B)
Paurometabolous
(C)
Ametabolous
(D)
Direct with no moulting
Show Answer & NCERT Explanation
Correct Answer: (B) Paurometabolous
It is paurometabolous (gradual, via nymphs).
Q43 of 70
NEET NCERT Line-by-Line
The frog Rana tigrina belongs to the class:
(A)
Reptilia
(B)
Amphibia
(C)
Aves
(D)
Mammalia
Show Answer & NCERT Explanation
Correct Answer: (B) Amphibia
The frog is an amphibian.
Q44 of 70
NEET NCERT Line-by-Line
The membrane protecting the frog's eye in water is the:
(A)
Tympanum
(B)
Nictitating membrane
(C)
Pericardium
(D)
Pleura
Show Answer & NCERT Explanation
Correct Answer: (B) Nictitating membrane
The nictitating membrane protects the eye.
Q45 of 70
NEET NCERT Line-by-Line
The frog's heart has:
(A)
2 chambers
(B)
3 chambers
(C)
4 chambers
(D)
1 chamber
Show Answer & NCERT Explanation
Correct Answer: (B) 3 chambers
Two atria + one ventricle = 3 chambers.
Q46 of 70
NEET NCERT Line-by-Line
Summer sleep in the frog is called:
(A)
Hibernation
(B)
Aestivation
(C)
Metamorphosis
(D)
Moulting
Show Answer & NCERT Explanation
Correct Answer: (B) Aestivation
Aestivation is summer dormancy.
Q47 of 70
NEET NCERT Line-by-Line
The frog excretes nitrogen mainly as:
(A)
Ammonia
(B)
Urea
(C)
Uric acid
(D)
Amino acids
Show Answer & NCERT Explanation
Correct Answer: (B) Urea
The frog is ureotelic (urea).
Q48 of 70
NEET NCERT Line-by-Line
How many pairs of cranial nerves does the frog have?
(A)
8
(B)
10
(C)
12
(D)
31
Show Answer & NCERT Explanation
Correct Answer: (B) 10
The frog has 10 pairs of cranial nerves.
Q49 of 70
NEET NCERT Line-by-Line
Fertilisation in the frog is:
(A)
Internal
(B)
External
(C)
Self
(D)
Absent
Show Answer & NCERT Explanation
Correct Answer: (B) External
Frog fertilisation is external, in water.
Q50 of 70
NEET NCERT Line-by-Line
Vasa efferentia of the male frog number about:
(A)
2–3
(B)
5–6
(C)
10–12
(D)
20–25
Show Answer & NCERT Explanation
Correct Answer: (C) 10–12
There are 10–12 vasa efferentia leading to Bidder's canal.
Q51 of 70
NEET NCERT Line-by-Line
Which sequence correctly traces the earthworm gut?
(A)
Mouth → gizzard → pharynx → stomach
(B)
Mouth → pharynx → oesophagus → gizzard → stomach → intestine
(C)
Mouth → stomach → gizzard → intestine
(D)
Mouth → intestine → gizzard → anus
Show Answer & NCERT Explanation
Correct Answer: (B) Mouth → pharynx → oesophagus → gizzard → stomach → intestine
Gizzard precedes the stomach; intestine begins at segment 15.
Q52 of 70
NEET NCERT Line-by-Line
A structure that grinds food and a structure that increases absorption in the earthworm are, respectively:
(A)
Typhlosole and gizzard
(B)
Gizzard and typhlosole
(C)
Clitellum and prostomium
(D)
Setae and nephridia
Show Answer & NCERT Explanation
Correct Answer: (B) Gizzard and typhlosole
Gizzard grinds; typhlosole absorbs.
Q53 of 70
NEET NCERT Line-by-Line
Which statement about earthworm circulation/respiration is correct?
(A)
Open circulation, lung breathing
(B)
Closed circulation, skin breathing
(C)
Open circulation, gill breathing
(D)
Closed circulation, tracheal breathing
Show Answer & NCERT Explanation
Correct Answer: (B) Closed circulation, skin breathing
Closed circulation; respiration through the moist body surface.
Q54 of 70
NEET NCERT Line-by-Line
The four pairs of spermathecae in the earthworm lie in segments:
(A)
10–11
(B)
12–13
(C)
6–9
(D)
14–16
Show Answer & NCERT Explanation
Correct Answer: (C) 6–9
Spermathecae occupy segments 6–9 (apertures open in 5–9).
Q55 of 70
NEET NCERT Line-by-Line
Which is the odd one out (cockroach excretory components)?
(A)
Malpighian tubules
(B)
Fat body
(C)
Uricose glands
(D)
Hepatic caecae
Show Answer & NCERT Explanation
Correct Answer: (D) Hepatic caecae
Hepatic caecae are digestive; the others are excretory.
Q56 of 70
NEET NCERT Line-by-Line
In the cockroach, the crop and gizzard are parts of the:
(A)
Midgut
(B)
Hindgut
(C)
Foregut
(D)
Haemocoel
Show Answer & NCERT Explanation
Correct Answer: (C) Foregut
Crop and gizzard are foregut structures.
Q57 of 70
NEET NCERT Line-by-Line
Open circulation in the cockroach means:
(A)
Blood is always in vessels
(B)
Organs are bathed in haemolymph within the haemocoel
(C)
There is no heart
(D)
Blood carries oxygen
Show Answer & NCERT Explanation
Correct Answer: (B) Organs are bathed in haemolymph within the haemocoel
Blood (haemolymph) flows freely through the haemocoel; trachea, not blood, carry O₂.
Q58 of 70
NEET NCERT Line-by-Line
Which feature is shared by earthworm AND cockroach?
(A)
Closed circulation
(B)
Trachea
(C)
Segmented body
(D)
Three-chambered heart
Show Answer & NCERT Explanation
Correct Answer: (C) Segmented body
Both are segmented invertebrates; circulation/respiration differ.
Q59 of 70
NEET NCERT Line-by-Line
Mosaic vision with low resolution but high sensitivity suits the cockroach because it is:
(A)
Aquatic
(B)
Nocturnal
(C)
Herbivorous
(D)
Blind
Show Answer & NCERT Explanation
Correct Answer: (B) Nocturnal
Mosaic vision aids nocturnal activity.
Q60 of 70
NEET NCERT Line-by-Line
Which set is correctly matched?
(A)
Tegmina → hindwings
(B)
Ootheca → sperm bundle
(C)
Spermatophore → sperm bundle
(D)
Ommatidia → mouthpart
Show Answer & NCERT Explanation
Correct Answer: (C) Spermatophore → sperm bundle
Spermatophores are sperm bundles; tegmina are forewings; ootheca is the egg-case.
Q61 of 70
NEET NCERT Line-by-Line
A three-chambered heart, ureotelism and external fertilisation together describe the:
(A)
Earthworm
(B)
Cockroach
(C)
Frog
(D)
All three
Show Answer & NCERT Explanation
Correct Answer: (C) Frog
These are frog features.
Q62 of 70
NEET NCERT Line-by-Line
Which respiratory route does the frog use during hibernation?
(A)
Lungs only
(B)
Buccal cavity only
(C)
Skin (cutaneous)
(D)
Trachea
Show Answer & NCERT Explanation
Correct Answer: (C) Skin (cutaneous)
During dormancy the frog breathes through its skin.
Q63 of 70
NEET NCERT Line-by-Line
The sinus venosus and conus arteriosus are associated with the:
(A)
Earthworm gut
(B)
Cockroach heart
(C)
Frog heart
(D)
Frog kidney
Show Answer & NCERT Explanation
Correct Answer: (C) Frog heart
They are inflow/outflow structures of the frog heart.
Q64 of 70
NEET NCERT Line-by-Line
In the male frog, sperm travel: testes → ? → kidney → Bidder's canal → cloaca.
(A)
Oviduct
(B)
Vasa efferentia
(C)
Malpighian tubules
(D)
Spermatheca
Show Answer & NCERT Explanation
Correct Answer: (B) Vasa efferentia
10–12 vasa efferentia carry sperm into the kidney.
Q65 of 70
NEET NCERT Line-by-Line
Which animal shows paurometabolous development through nymphs?
(A)
Earthworm
(B)
Cockroach
(C)
Frog
(D)
Hydra
Show Answer & NCERT Explanation
Correct Answer: (B) Cockroach
The cockroach develops via nymphal stages (paurometabolous).
Q66 of 70
NEET NCERT Line-by-Line
Which is an INCORRECT tissue–feature pairing?
(A)
Skeletal muscle → striated, voluntary
(B)
Smooth muscle → fusiform, involuntary
(C)
Cardiac muscle → striated, voluntary
(D)
Neural → neurons + neuroglia
Show Answer & NCERT Explanation
Correct Answer: (C) Cardiac muscle → striated, voluntary
Cardiac muscle is striated but INVOLUNTARY.
Q67 of 70
NEET NCERT Line-by-Line
Which junction-and-function pairing is wrong?
(A)
Tight → prevent leakage
(B)
Adhering → cement cells
(C)
Gap → communication
(D)
Tight → fat storage
Show Answer & NCERT Explanation
Correct Answer: (D) Tight → fat storage
Tight junctions seal tissue; they do not store fat.
Q68 of 70
NEET NCERT Line-by-Line
The earthworm 'number ladder' places the male pores at segment ___ and the clitellum at ___.
(A)
14; 18
(B)
18; 14–16
(C)
10; 12
(D)
16; 26
Show Answer & NCERT Explanation
Correct Answer: (B) 18; 14–16
Male pores at 18; clitellum at 14–16.
Q69 of 70
NEET NCERT Line-by-Line
Which animal lacks a cell wall, a notochord in adults, and breathes partly through skin?
(A)
Earthworm
(B)
Cockroach
(C)
Frog
(D)
Mushroom
Show Answer & NCERT Explanation
Correct Answer: (C) Frog
The frog (a chordate amphibian) breathes partly through skin.
Q70 of 70
NEET NCERT Line-by-Line
Choose the correct ascending count: cockroach abdominal ganglia, thoracic ganglia, gizzard teeth.
(A)
6, 3, 6
(B)
3, 6, 6
(C)
6, 6, 3
(D)
3, 3, 6
Show Answer & NCERT Explanation
Correct Answer: (A) 6, 3, 6
6 abdominal ganglia, 3 thoracic ganglia, 6 gizzard teeth.