NEET-Level MCQs (Hard)
Chapter: Animal Kingdom – Basis of Classification & Levels of Organisation
Advanced MCQs
Q1. Which one of the following combinations is correctly matched?
| Animal Group | Level of Organisation |
|---|---|
| A. Porifera — Organ level | |
| B. Coelenterata — Cellular level | |
| C. Platyhelminthes — Tissue level | |
| D. Ctenophora — Tissue level |
✅ Answer: D. Ctenophora — Tissue level
Explanation:
- Porifera → Cellular level
- Coelenterata → Tissue level
- Platyhelminthes → Organ level
Q2. The first phylum to exhibit organ level of organisation is:
A. Porifera
B. Coelenterata
C. Platyhelminthes
D. Annelida
✅ Answer: C. Platyhelminthes
Q3. Which of the following characteristics is NOT generally used in animal classification?
A. Symmetry
B. Nature of coelom
C. Pattern of organ systems
D. Habitat color variation
✅ Answer: D. Habitat color variation
Q4. In tissue level organisation:
A. Organs are absent
B. Tissues combine to form organ systems
C. Similar cells perform a common function
D. Cells remain loosely aggregated
✅ Answer: C. Similar cells perform a common function
Q5. Which statement is incorrect regarding sponges?
A. They are multicellular
B. They show cellular level organisation
C. They possess true tissues
D. Some division of labour occurs among cells
✅ Answer: C. They possess true tissues
Q6. Which one of the following sequences represents increasing complexity of organisation?
A. Organ → Tissue → Cellular
B. Cellular → Tissue → Organ
C. Tissue → Cellular → Organ
D. Tissue → Organ → Cellular
✅ Answer: B. Cellular → Tissue → Organ
Q7. Which feature evolved first in animal evolution?
A. Organ system
B. Organ level
C. Tissue level
D. Cellular level
✅ Answer: D. Cellular level
Q8. Animals with organ level organisation always possess:
A. Organ systems
B. Tissues
C. Segmentation
D. Coelom
✅ Answer: B. Tissues
Explanation:
- Organs are made up of tissues.
- Coelom and segmentation may or may not be present.
Q9. Select the correctly matched pair:
A. Porifera — Tissue level
B. Cnidaria — Organ level
C. Platyhelminthes — Organ level
D. Annelida — Cellular level
✅ Answer: C. Platyhelminthes — Organ level
Q10. Which one of the following statements is correct?
A. All multicellular animals possess organs
B. Sponges exhibit tissue level organisation
C. Coelenterates possess tissues but no organs
D. Organ systems first appear in Platyhelminthes
✅ Answer: C. Coelenterates possess tissues but no organs
Assertion & Reason (NEET Pattern)
Q11.
Assertion (A):
Sponges are placed at the lowest level of organisation among multicellular animals.
Reason (R):
Their cells are loosely aggregated and do not form tissues.
A. Both A and R are true and R is correct explanation
B. Both A and R are true but R is not correct explanation
C. A is true but R is false
D. A is false but R is true
✅ Answer: A
Q12.
Assertion (A):
All animals with tissue level organisation lack organs.
Reason (R):
Organs are formed only when tissues combine together.
✅ Answer: A
Q13.
Assertion (A):
Organ level organisation is more advanced than tissue level organisation.
Reason (R):
Different tissues work together to perform specialized functions.
✅ Answer: A
Statement-Based NEET Questions
Q14. Which of the following statements are correct?
- All animals are multicellular.
- Sponges possess tissues.
- Coelenterates exhibit tissue level organisation.
- Organ level organisation begins in Platyhelminthes.
A. 1, 2 and 3 only
B. 1, 3 and 4 only
C. 2 and 4 only
D. 1 and 2 only
✅ Answer: B. 1, 3 and 4 only
Q15. Identify the incorrect statement:
A. Classification helps in systematic study
B. Body symmetry is a classification criterion
C. All multicellular animals have organ systems
D. Coelom is important in classification
✅ Answer: C
Match the Columns (NEET Level)
| Column I | Column II |
|---|---|
| A. Porifera | 1. Organ level |
| B. Cnidaria | 2. Cellular level |
| C. Platyhelminthes | 3. Tissue level |
Codes:
A. A-2, B-3, C-1
B. A-3, B-2, C-1
C. A-1, B-2, C-3
D. A-2, B-1, C-3
✅ Answer: A. A-2, B-3, C-1
NEET Previous Year Questions (PYQs)
Chapter: Animal Kingdom
NEET PYQs with Answers & Explanations
Q1. (NEET)
The body cavity present between the body wall and gut wall is called:
A. Pseudocoelom
B. Haemocoel
C. Coelom
D. Spongocoel
✅ Answer: C. Coelom
Explanation:
- Coelom is the fluid-filled cavity between body wall and digestive tract.
Q2. (NEET)
Which of the following animals exhibits tissue level of organisation?
A. Sponges
B. Cnidarians
C. Platyhelminthes
D. Molluscs
✅ Answer: B. Cnidarians
Explanation:
- Cnidarians (Coelenterates) are the first animals to show true tissues.
Q3. (AIPMT/NEET)
Which one of the following phyla is correctly matched with its organisational level?
A. Porifera — Tissue level
B. Cnidaria — Organ level
C. Platyhelminthes — Organ level
D. Annelida — Cellular level
✅ Answer: C. Platyhelminthes — Organ level
Q4. (NEET)
Animals with cells arranged in loose cell aggregates belong to:
A. Cnidaria
B. Porifera
C. Mollusca
D. Arthropoda
✅ Answer: B. Porifera
Q5. (AIPMT)
Which one of the following statements is incorrect?
A. Sponges are multicellular
B. Coelenterates have tissue level organisation
C. Platyhelminthes possess organ level organisation
D. All multicellular animals possess organ systems
✅ Answer: D. All multicellular animals possess organ systems
Q6. (NEET)
The simplest level of organisation among multicellular animals is:
A. Organ system level
B. Organ level
C. Tissue level
D. Cellular level
✅ Answer: D. Cellular level
Q7. (NEET)
Which feature is most important for classification of animals?
A. Habitat
B. Colour
C. Body organisation
D. Feeding habit
✅ Answer: C. Body organisation
Q8. (AIPMT)
The first animals to have organ level of organisation are:
A. Coelenterates
B. Poriferans
C. Platyhelminthes
D. Annelids
✅ Answer: C. Platyhelminthes
Assertion & Reason PYQs
Q9. (NEET)
Assertion (A):
Sponges possess cellular level organisation.
Reason (R):
Cells in sponges are loosely arranged and do not form tissues.
A. Both A and R are true and R is correct explanation
B. Both A and R are true but R is not correct explanation
C. A is true but R is false
D. A is false but R is true
✅ Answer: A
Q10. (NEET)
Assertion (A):
Coelenterates exhibit tissue level organisation.
Reason (R):
Cells performing similar functions are grouped into tissues.
✅ Answer: A
NEET PYQ-Based Match the Column
| Column I | Column II |
|---|---|
| A. Porifera | 1. Organ level |
| B. Coelenterata | 2. Cellular level |
| C. Platyhelminthes | 3. Tissue level |
Options:
A. A-2, B-3, C-1
B. A-1, B-2, C-3
C. A-3, B-1, C-2
D. A-2, B-1, C-3
✅ Answer: A. A-2, B-3, C-1
Important NEET One-Liners
Porifera → Cellular level
Cnidaria → Tissue level
Platyhelminthes → Organ level
Annelida onwards → Organ-system level
Most Repeated NEET Concepts
Frequently Asked:
- Levels of organisation
- Coelom
- Symmetry
- Basis of classification
- Organ vs tissue level
Fast Revision Trick
P → Porifera → Cellular
C → Cnidaria → Tissue
P → Platyhelminthes → Organ
A → Annelida → Organ System
Mnemonic:
“Poor Children Prefer Automation”
Full Mock Test – Animal Kingdom
Total Questions: 45
Level: NEET
Time: 45 Minutes
SECTION A – MCQs (1–30)
Q1.
Animals are classified mainly to:
A. Increase species number
B. Simplify study of animals
C. Change animal names
D. Remove similarities
Q2.
Cellular level of organisation is seen in:
A. Cnidaria
B. Porifera
C. Mollusca
D. Annelida
Q3.
The first phylum to show tissue level organisation is:
A. Porifera
B. Cnidaria
C. Platyhelminthes
D. Arthropoda
Q4.
Organ level organisation first appears in:
A. Porifera
B. Cnidaria
C. Platyhelminthes
D. Echinodermata
Q5.
Body cavity between gut wall and body wall is:
A. Coelom
B. Blastocoel
C. Spongocoel
D. Ostia
Q6.
Animals with loosely arranged cells belong to:
A. Porifera
B. Annelida
C. Mollusca
D. Chordata
Q7.
Which is NOT a basis of classification?
A. Symmetry
B. Coelom
C. Cell arrangement
D. Eye colour
Q8.
Cnidarians exhibit:
A. Organ level
B. Tissue level
C. Cellular level
D. Organ system level
Q9.
Similar cells grouped together form:
A. Organ
B. Tissue
C. Organ system
D. Coelom
Q10.
Which animals possess organ system level organisation?
A. Porifera
B. Cnidaria
C. Platyhelminthes
D. Annelida onwards
Q11.
Sponges are:
A. Unicellular
B. Multicellular
C. Colonial protozoans
D. Plants
Q12.
Which statement is incorrect?
A. Porifera have tissues
B. Cnidaria show tissue level
C. Platyhelminthes show organ level
D. Classification helps systematic study
Q13.
The simplest multicellular animals belong to:
A. Mollusca
B. Porifera
C. Arthropoda
D. Echinodermata
Q14.
Organ systems are formed by:
A. Cells
B. Tissues
C. Organs
D. Coelom
Q15.
Animals showing tissue level organisation lack:
A. Cells
B. Tissues
C. Organs
D. Symmetry
Q16.
Coelom is absent in:
A. Acoelomates
B. Coelomates
C. Pseudocoelomates
D. Arthropods
Q17.
Platyhelminthes are:
A. Tissue level animals
B. Organ level animals
C. Cellular level animals
D. Organ system level animals
Q18.
Which feature evolved first?
A. Organs
B. Tissues
C. Organ systems
D. Cellular organisation
Q19.
Sponges show:
A. True tissues
B. Organ systems
C. Division of labour
D. Coelom
Q20.
The study of classification is called:
A. Anatomy
B. Physiology
C. Taxonomy
D. Histology
Q21.
Animals with radial symmetry are commonly:
A. Bilaterians
B. Cnidarians
C. Arthropods
D. Chordates
Q22.
True tissues first appeared in:
A. Porifera
B. Protozoa
C. Cnidaria
D. Annelida
Q23.
Which is correctly matched?
A. Porifera – Organ level
B. Cnidaria – Tissue level
C. Mollusca – Cellular level
D. Platyhelminthes – Tissue level
Q24.
The function of classification is:
A. Confuse organisms
B. Study similarities and differences
C. Reduce biodiversity
D. Eliminate species
Q25.
Cells performing same function collectively form:
A. Organ
B. Tissue
C. Organism
D. Symmetry
Q26.
Which level is most advanced?
A. Cellular
B. Tissue
C. Organ
D. Organ system
Q27.
Coelenterates are also called:
A. Poriferans
B. Flatworms
C. Cnidarians
D. Roundworms
Q28.
Organ level organisation means:
A. Loose cells
B. Tissues form organs
C. Organs form tissues
D. Cells form organs directly
Q29.
Which one lacks true tissues?
A. Porifera
B. Cnidaria
C. Platyhelminthes
D. Arthropoda
Q30.
Classification based on evolutionary relationships is:
A. Artificial
B. Natural
C. Phylogenetic
D. Numerical
SECTION B – Assertion & Reason (31–38)
Q31.
Assertion: Sponges possess cellular level organisation.
Reason: Their cells are loosely aggregated.
A. Both true; R correct explanation
B. Both true; R not explanation
C. A true; R false
D. A false; R true
Q32.
Assertion: Coelenterates possess organs.
Reason: Tissue level organisation exists in them.
A. Both true
B. A true R false
C. A false R true
D. Both false
Q33.
Assertion: Organ level organisation is more advanced than tissue level.
Reason: Different tissues combine to form organs.
A. Both true; R correct explanation
B. Both true; R not explanation
C. A true R false
D. Both false
Q34.
Assertion: Classification helps easy study of animals.
Reason: Animals show huge diversity.
A. Both true; R correct explanation
B. Both true; R not explanation
C. A true R false
D. Both false
Q35.
Assertion: Porifera possess true tissues.
Reason: Cells are specialised.
A. Both true
B. A true R false
C. A false R true
D. Both false
Q36.
Assertion: Organ systems are present in annelids onwards.
Reason: Organs work together systematically.
A. Both true; R correct explanation
B. Both true; R not explanation
C. A true R false
D. Both false
Q37.
Assertion: All multicellular animals have organ systems.
Reason: All multicellular animals have tissues.
A. Both true
B. A true R false
C. A false R true
D. Both false
Q38.
Assertion: Coelom is important in classification.
Reason: It represents body cavity organisation.
A. Both true; R correct explanation
B. Both true; R not explanation
C. A true R false
D. Both false
SECTION C – Match the Column (39–42)
Q39.
| Column I | Column II |
|---|---|
| A. Porifera | 1. Organ level |
| B. Cnidaria | 2. Cellular level |
| C. Platyhelminthes | 3. Tissue level |
Options:
A. A-2, B-3, C-1
B. A-3, B-2, C-1
C. A-1, B-2, C-3
D. A-2, B-1, C-3
Q40.
| Column I | Column II |
|---|---|
| A. Tissue | 1. Group of organs |
| B. Organ | 2. Similar cells |
| C. Organ system | 3. Group of tissues |
Options:
A. A-2, B-3, C-1
B. A-1, B-2, C-3
C. A-3, B-1, C-2
D. A-2, B-1, C-3
Q41.
| Column I | Column II |
|---|---|
| A. Cellular level | 1. Platyhelminthes |
| B. Tissue level | 2. Porifera |
| C. Organ level | 3. Cnidaria |
Options:
A. A-2, B-3, C-1
B. A-3, B-1, C-2
C. A-1, B-2, C-3
D. A-2, B-1, C-3
Q42.
| Column I | Column II |
|---|---|
| A. Coelom | 1. Body symmetry |
| B. Symmetry | 2. Body cavity |
| C. Tissue | 3. Group of similar cells |
Options:
A. A-2, B-1, C-3
B. A-1, B-2, C-3
C. A-3, B-2, C-1
D. A-2, B-3, C-1
SECTION D – Case Study (43–45)
Case Study
A zoologist discovered an aquatic animal with loosely arranged cells and no true tissues.
Q43.
The organism belongs to:
A. Porifera
B. Cnidaria
C. Mollusca
D. Arthropoda
Q44.
The level of organisation is:
A. Tissue level
B. Organ level
C. Cellular level
D. Organ system level
Q45.
Which statement is correct?
A. Organs are present
B. True tissues absent
C. Coelom present
D. Bilateral symmetry present
ANSWER SHEET WITH EXPLANATIONS
| Q | Ans | Explanation |
|---|---|---|
| 1 | B | Classification simplifies study |
| 2 | B | Porifera show cellular level |
| 3 | B | Cnidaria first show tissues |
| 4 | C | Platyhelminthes show organs |
| 5 | A | Coelom = body cavity |
| 6 | A | Sponges have loose cells |
| 7 | D | Eye colour not classification basis |
| 8 | B | Cnidarians → tissue level |
| 9 | B | Similar cells form tissues |
| 10 | D | Annelids onwards show organ systems |
| 11 | B | Sponges are multicellular |
| 12 | A | Porifera lack true tissues |
| 13 | B | Sponges simplest multicellular animals |
| 14 | C | Organs combine into systems |
| 15 | C | Tissue level lacks organs |
| 16 | A | Acoelomates lack coelom |
| 17 | B | Flatworms → organ level |
| 18 | D | Cellular organisation evolved first |
| 19 | C | Division of labour occurs |
| 20 | C | Classification study = taxonomy |
| 21 | B | Cnidarians mostly radial |
| 22 | C | True tissues first in cnidarians |
| 23 | B | Correct match |
| 24 | B | Classification studies similarities |
| 25 | B | Cells form tissues |
| 26 | D | Organ system most advanced |
| 27 | C | Coelenterates = cnidarians |
| 28 | B | Tissues combine into organs |
| 29 | A | Porifera lack tissues |
| 30 | C | Phylogenetic = evolutionary |
| 31 | A | Correct explanation |
| 32 | C | Cnidarians lack organs |
| 33 | A | Correct explanation |
| 34 | A | Correct explanation |
| 35 | C | Specialised cells but no tissues |
| 36 | A | Correct explanation |
| 37 | D | Not all multicellular animals have tissues/systems |
| 38 | A | Correct explanation |
| 39 | A | Correct matching |
| 40 | A | Correct hierarchy |
| 41 | A | Correct matching |
| 42 | A | Correct matching |
| 43 | A | Loose cells → Porifera |
| 44 | C | Cellular level |
| 45 | B | True tissues absent |
NEET Concept Booster
Levels of Organisation
Porifera → Cellular level
Cnidaria → Tissue level
Platyhelminthes → Organ level
Higher Phyla → Organ-system level
Super Mnemonic
"Poor Children Play Organ"
P → Porifera → Cellular
C → Cnidaria → Tissue
P → Platyhelminthes → Organ
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