Ticker

6/recent/ticker-posts

Ad Code

Responsive Advertisement

NEET MCQs On Structural Organisation in Animals

DEEKSHA August 20, 2025

 Structural Organisation in Animals – NEET MCQs with Concept Explanation | Class 11 NCERT

In the animal world, every organism is beautifully organized. From the smallest cell to the most complex organ system, each level of organization plays a vital role in survival.

Levels of animal organisation

  • Animal tissues (epithelial, connective, muscular, nervous)
  • Morphology and anatomy of earthworm, cockroach, and frog (which are frequently asked in NEET).
  • To help you prepare smartly, here are high-yield MCQs with answers and quick concept explanation.
NEET MCQs On Structural Organisation in Animals
1. Levels of Organisation – 
Cellular → Tissue → Organ → Organ system.
2. Animal Tissues – 
Epithelial (covering/lining)
Connective (support & binding)
Muscular (movement)
Nervous (impulse conduction)
3. Earthworm (Pheretima posthuma) – segmented worm, closed circulatory system, hermaphrodite.
4. Cockroach (Periplaneta americana) – exoskeleton of chitin, tracheal respiration, open blood circulation.
5. Frog (Rana tigrina) – 
amphibian, 3-chambered heart, lungs + skin respiration.

MCQs with Concept Explanation 

Q1. Which level of organisation is first seen in animals like Hydra?
A) Cellular
B) Tissue 
C) Organ
D) Organ system
Answer is : B) Tissue
Concept Explanation:
Cnidarians (Hydra, Jellyfish) show tissue-level organisation for the first time.

Q2. Which tissue lines the kidney tubules?
A) Squamous epithelium
B) Cuboidal epithelium 
C) Columnar epithelium
D) Ciliated epithelium
Answer is : B) Cuboidal epithelium
Concept Explanation:
Cuboidal epithelium helps in absorption and secretion, found in kidney tubules.

Q3. The connective tissue that stores fat is:
A) Cartilage
B) Ligament
C) Adipose 
D) Areolar
Answer is : C) Adipose
Concept Explanation:
Adipose tissue stores fat and insulates the body against heat loss.

Q4. Which muscle is involuntary and non-striated?
A) Skeletal muscle
B) Cardiac muscle
C) Smooth muscle 
D) Voluntary muscle
Answer is : C) Smooth muscle
Concept Explanation:
Smooth muscles are involuntary, spindle-shaped, and non-striated, present in visceral organs.

Q5. Earthworm’s circulatory system is:
A) Open type
B) Closed type 
C) Both open and closed
D) Absent
Answer is : B) Closed type
Concept Explanation:
Unlike insects, earthworms have a closed circulatory system with blood vessels and capillaries.

Q6. In earthworm, the clitellum is located on:
A) 1–10 segments
B) 14–16 segments 
C) 20–25 segments
D) 30–35 segments
Answer is : B) 14–16 segments
Concept Explanation:
Clitellum (14–16 segments) secretes cocoon for egg fertilization.

Q7. Cockroach blood does not transport:
A) Food
B) Oxygen 
C) Hormones
D) Waste
Answer is : B) Oxygen
Concept Explanation:
Cockroach has open circulation; its blood (haemolymph) lacks hemoglobin, so oxygen transport is absent.

Q8. Respiratory organs in cockroach are:
A) Gills
B) Lungs
C) Spiracles and tracheae 
D) Skin
Answer is : C) Spiracles and tracheae
Concept Explanation:
Cockroaches breathe via spiracles → trachea → tracheoles (direct diffusion of gases).

Q9. Which mouthpart of cockroach is used for cutting?
A) Mandibles 
B) Maxillae
C) Labrum
D) Labium
Answer is : A) Mandibles
Concept Explanation:
Mandibles are strong, chitinous jaws for cutting and chewing food.

Q10. Frog respires through:
A) Skin
B) Lungs
C) Buccal cavity
D) All of the above 
Answer is : D) All of the above
Concept Explanation:
Frogs are amphibians – cutaneous (skin), pulmonary (lungs), buccopharyngeal respiration.

Q11. Frog’s heart has:
A) 2 chambers
B) 3 chambers 
C) 4 chambers
D) 5 chambers
Answer is : B) 3 chambers
Concept Explanation:
Amphibians have 3-chambered heart (2 atria + 1 ventricle), with some mixing of blood.

Q12. In frog, nitrogenous waste is excreted as:
A) Uric acid
B) Ammonia
C) Urea 
D) Nitrate
Answer is : C) Urea
Concept Explanation:
Frogs are ureotelic – they excrete nitrogen mainly as urea.

Q13. Nervous tissue consists of:
A) Chondrocytes
B) Neurons 
C) Osteocytes
D) Fibroblasts
Answer is : B) Neurons
Concept Explanation:
Neurons are the structural and functional units of nervous tissue, transmitting impulses.

Q14. Ligament connects:
A) Bone to bone 
B) Muscle to bone
C) Muscle to muscle
D) Cartilage to bone
Answer is : A) Bone to bone
Concept Explanation:
Ligaments = Bone to bone
Tendons = Muscle to bone

Q15. The body cavity of cockroach is filled with:
A) Blood
B) Haemolymph 
C) Plasma
D) Lymph
Answer is : B) Haemolymph
Concept Explanation:
Cockroaches have haemocoel filled with haemolymph, not true 
  • Tissues form the foundation of animal body organisation.
  • Earthworm → closed circulation, clitellum (14–16 segments).
  • Cockroach → open circulation, tracheal respiration, chitin exoskeleton.
  • Frog → amphibious, 3-chambered heart, multiple respiration modes.

Exam Tip

Most NEET questions from this chapter are direct fact-based. Focus on:
Tissues (epithelial & connective)
Earthworm clitellum, circulation
Cockroach anatomy (mouthparts, trachea, haemocoel)
Frog heart & respiration


DEEKSHA

Posted by DEEKSHA

Post a Comment

0 Comments