Key Fact
Five-kingdom classification
Whittaker (1969) proposed five kingdoms: Monera, Protista, Fungi, Plantae, Animalia. Criteria: cell type, body organisation, mode of nutrition, reproduction, phylogeny.
-- NCERT Class 11 Biology, Ch. 2, p. 11Five Kingdom
8 MCQs9-step worked example
Source: NCERT Diversity in Living WorldPYQ coverage: NEET 2025Official key: NTA-verifiedLast updated: 27 Sep 2026
Five Kingdom, explained for NEET
Whittaker's five-kingdom classification is one of the most frequently tested recall topics from NCERT Class 11 Biology Chapter 2. The system replaced the older two-kingdom classification (Plantae and Animalia) by using five criteria — cell structure, body organisation, mode of nutrition, reproduction, and phylogenetic relationships — to sort all living organisms into Monera, Protista, Fungi, Plantae, and Animalia.
Why Whittaker, not Linnaeus? The two-kingdom system forced organisms like bacteria, fungi, and unicellular eukaryotes into either Plantae or Animalia, creating artificial groupings. Whittaker (1969) resolved this by giving prokaryotes their own kingdom (Monera) and separating fungi (absorptive heterotrophs) from plants (autotrophs).
The five kingdoms at a glance:
| Kingdom | Cell type | Organisation | Nutrition |
|---|---|---|---|
| Monera | Prokaryotic | Unicellular | Autotrophic or heterotrophic |
| Protista | Eukaryotic | Unicellular | Auto-, hetero-, or mixotrophic |
| Fungi | Eukaryotic | Multi- (rarely uni-) | Absorptive heterotrophic |
| Plantae | Eukaryotic | Multicellular | Autotrophic (photosynthetic) |
| Animalia | Eukaryotic | Multicellular | Ingestive heterotrophic |
NEET watch-out: Questions frequently test the criteria Whittaker used — not just the kingdom names. A common distractor lists "habitat" or "locomotion" as a Whittaker criterion. It is not. The five criteria are: cell structure, body organisation, mode of nutrition, mode of reproduction, and phylogenetic relationships (NCERT Class 11 Biology Chapter 2, page 11).
Another frequent ask: which kingdoms can include autotrophs? Both Monera and Protista contain autotrophic members alongside heterotrophs — this mixed nutrition is a defining feature that separates them from Fungi (always heterotrophic).
Can you answer these Five Kingdom MCQs?
Select an option to see the explanation. Wrong answers show why your choice was tempting — and name the exact trap it exploits.
MCQ 1Easy RecallPractice
Which of the following is NOT a criterion used by Whittaker for the five-kingdom classification?
Show answer and why every option is right or wrong
Answer: C. Whittaker's five criteria are cell structure, body organisation, mode of nutrition, mode of reproduction, and phylogenetic relationships (NCERT Class 11 Biology Chapter 2, page 11). Habitat is not among them.
Why A is wrong: A is wrong because mode of nutrition is one of Whittaker's five criteria — it distinguishes autotrophic kingdoms from heterotrophic ones.
Why B is wrong: B is wrong because cell structure (prokaryotic vs eukaryotic) is a primary Whittaker criterion — it separates Monera from the other four kingdoms.
Why D is wrong: D is wrong because phylogenetic relationships are explicitly listed as the fifth criterion in NCERT — Whittaker used evolutionary relatedness alongside structural and nutritional features.
MCQ 2Easy RecallPractice
The five-kingdom classification was proposed by:
Show answer and why every option is right or wrong
Answer: C. R.H. Whittaker proposed the five-kingdom classification in 1969 (NCERT Class 11 Biology Chapter 2, page 11).
Why A is wrong: A is wrong because Linnaeus proposed the two-kingdom classification (Plantae and Animalia), not the five-kingdom system.
Why B is wrong: B is wrong because Copeland proposed a four-kingdom classification; he separated Monera from Protista but did not create the five-kingdom scheme.
Why D is wrong: D is wrong because Haeckel proposed a three-kingdom system (Protista, Plantae, Animalia); the five-kingdom system came later through Whittaker.
MCQ 3Direct ApplicationPractice
In Whittaker's classification, which kingdom includes organisms that are exclusively multicellular and ingestive heterotrophic?
Show answer and why every option is right or wrong
Answer: A. Kingdom Animalia is defined by multicellular organisation and ingestive heterotrophic nutrition (NCERT Class 11 Biology Chapter 2, page 11). No other kingdom combines both features exclusively.
Why B is wrong: B is wrong because Protista is unicellular, not multicellular — and includes autotrophs alongside heterotrophs.
Why C is wrong: C is wrong because Plantae are autotrophic (photosynthetic), not heterotrophic.
Why D is wrong: D is wrong because Fungi are absorptive heterotrophs (they secrete enzymes externally and absorb nutrients), not ingestive heterotrophs.
MCQ 4Direct ApplicationPractice
Which pair of kingdoms in Whittaker's system can include both autotrophic and heterotrophic members?
Show answer and why every option is right or wrong
Answer: A. Both Monera (e.g. photosynthetic cyanobacteria and chemosynthetic bacteria alongside heterotrophic bacteria) and Protista (e.g. photosynthetic diatoms alongside heterotrophic amoeba) include autotrophic and heterotrophic members (NCERT Class 11 Biology Chapter 2, page 11).
Why B is wrong: B is wrong because Fungi are exclusively heterotrophic (absorptive); they never photosynthesise. Plantae are autotrophic. This pair does not share mixed nutritional modes.
Why C is wrong: C is wrong because Animalia is exclusively ingestive heterotrophic — no autotrophic members exist in the kingdom.
Why D is wrong: D is wrong because Fungi are exclusively absorptive heterotrophic. While Monera does include both modes, Fungi does not, so the pair fails.
MCQ 5Direct ApplicationPractice
The major basis for shifting organisms like fungi from Plantae to a separate kingdom in Whittaker's system was:
Show answer and why every option is right or wrong
Answer: B. Fungi were placed in their own kingdom primarily because their absorptive heterotrophic nutrition is fundamentally different from the photosynthetic autotrophy of Plantae (NCERT Class 11 Biology Chapter 2, page 11). Mode of nutrition was the key distinguishing criterion.
Why A is wrong: A is wrong because while fungi do reproduce differently from plants, it was not the primary reason for their separation — mode of nutrition was the decisive criterion.
Why C is wrong: C is wrong because habitat is not one of Whittaker's five criteria at all; it played no role in separating fungi from plants.
Why D is wrong: D is wrong because body size is not a Whittaker classification criterion. Some fungi are microscopic (yeasts), and this was not relevant to their kingdom placement.
MCQ 6Easy RecallPractice
Which kingdom in Whittaker's classification contains exclusively prokaryotic organisms?
Show answer and why every option is right or wrong
Answer: D. Monera is the only kingdom comprising exclusively prokaryotic organisms — all other four kingdoms (Protista, Fungi, Plantae, Animalia) are eukaryotic (NCERT Class 11 Biology Chapter 2, page 11).
Why A is wrong: A is wrong because Protista is entirely eukaryotic. Though its members are unicellular, they possess a true membrane-bound nucleus.
Why B is wrong: B is wrong because Fungi are eukaryotic organisms with well-defined membrane-bound organelles.
Why C is wrong: C is wrong because Plantae are eukaryotic multicellular organisms.
MCQ 7Concept TrapPractice
The two-kingdom classification system was inadequate because:
Show answer and why every option is right or wrong
Answer: D. The two-kingdom system (Plantae and Animalia) forced fungi, bacteria, and unicellular eukaryotes into inappropriate groupings. Fungi are heterotrophic but were placed with autotrophic plants; bacteria are prokaryotic but lumped with eukaryotes (NCERT Class 11 Biology Chapter 2, page 11). Whittaker's five-kingdom system resolved these misplacements.
Why A is wrong: A is wrong because the two-kingdom system placed organisms in Plantae OR Animalia — not all multicellular organisms went to Animalia. Plants, fungi, and algae were all grouped under Plantae.
Why B is wrong: B is wrong because the two-kingdom system had only two kingdoms, not too many. The problem was too few categories, not excess.
Why C is wrong: C is wrong because the two-kingdom system was based primarily on gross morphology and nutrition (plant-like vs animal-like), not on phylogenetic relationships — that was actually one of Whittaker's improvements.
MCQ 8CalculationPractice
Consider the following statements about Whittaker's five-kingdom classification:
(i) Cell wall composition is the same across Monera, Fungi, and Plantae.
(ii) Protista includes both photosynthetic and heterotrophic unicellular eukaryotes.
(iii) Animalia lacks a cell wall entirely.
Which of the above statements is/are correct?
Show answer and why every option is right or wrong
Answer: B. Statement (i) is incorrect — cell wall composition differs: Monera has peptidoglycan, Fungi have chitin, and Plantae have cellulose. Statement (ii) is correct — Protista includes photosynthetic members (e.g. diatoms) and heterotrophic members (e.g. amoeba). Statement (iii) is correct — animal cells lack cell walls entirely (NCERT Class 11 Biology Chapter 2). Therefore (ii) and (iii) are correct.
Why A is wrong: A is wrong because it excludes statement (iii). Animal cells lack a cell wall — this is a well-established fact and statement (iii) is correct.
Why C is wrong: C is wrong because statement (i) is false. Cell wall composition differs across the three kingdoms: peptidoglycan in Monera, chitin in Fungi, cellulose in Plantae.
Why D is wrong: D is wrong because statement (i) is false — cell wall composition is NOT the same across Monera, Fungi, and Plantae.
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How do you solve a Five Kingdom question? A worked example
- 1
Given
• Unicellular• Eukaryotic• Photosynthetic• No cell wall
- 2
Required
Identify the correct kingdom under Whittaker's classification.
- 3
Concept
Whittaker's classification uses five criteria: cell structure, body organisation, mode of nutrition, mode of reproduction, and phylogenetic relationships. We apply these sequentially to narrow down the kingdom.
- 4
Formula / Rule
No mathematical formula applies. The classification key is:• Prokaryotic → Monera• Eukaryotic + unicellular → Protista• Eukaryotic + multicellular + autotrophic → Plantae• Eukaryotic + multicellular + absorptive heterotrophic → Fungi• Eukaryotic + multicellular + ingestive heterotrophic → Animalia
- 5
Substitution
The organism is eukaryotic (eliminates Monera) and unicellular (eliminates Plantae, Fungi, Animalia — all primarily multicellular). This places it in Protista.
- 6
Reasoning check
Photosynthesis might tempt placement in Plantae, but Plantae organisms are multicellular. Protista accommodates photosynthetic unicellular eukaryotes (e.g. Euglena, certain dinoflagellates). The absence of a cell wall is consistent — many protists lack cell walls.
- 7
Final answer
Kingdom Protista.
- 8
Common trap
The photosynthesis cue tempts students to select Plantae. But Whittaker's system places unicellular eukaryotic photosynthesisers in Protista regardless of nutritional mode. Body organisation (unicellular vs multicellular) takes precedence in narrowing the kingdom.
- 9
Similar NEET-style question
"A prokaryotic organism that performs photosynthesis belongs to which kingdom?" Answer: Monera — the prokaryotic cell structure overrides the autotrophic nutrition and places it in Monera (e.g. cyanobacteria), not Plantae.
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What to remember before solving Five Kingdom questions
More in Diversity in Living World: 16 exam traps and mistakes · 1 question pattern from its other lessons.
Five Kingdom questions from past NEET papers
1 question from NEET 2025. Answers verified against NTA official keys.
NEET 2025
1C, E, A, B, D
2A, C, E, B, D
3C, E, A, D, B
4A, C, E, D, B
NTA Answer: Option 3(final)
All 59 past-paper questions from Diversity in Living World →
Sources
NCERT refs: Class 11 Biology Chapter 2, p.11
Page numbers are the ones printed in the current NCERT textbook (2023 rationalised edition), unless marked pre-2023. The books are free at ncert.nic.in.
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