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Biological Classification — NEET MCQs with answers
R.H. Whittaker (1969) proposed the Five Kingdom Classification — Monera, Protista, Fungi, Plantae and Animalia — using cell structure, body organisation, mode of nutrition, reproduction and phylogenetic relationships as the main criteria. The earlier Two Kingdom system of Linnaeus' time was found inadequate because a large number of organisms did not fall into either category. The chapter surveys the five kingdoms and also introduces lichens and the acellular viruses, viroids and prions, which find no mention in Whittaker's system.
Topics in this chapter
- 2.1 Kingdom Monera
- 2.2 Kingdom Protista
- 2.3 Kingdom Fungi
- 2.4 Kingdom Plantae
- 2.5 Kingdom Animalia
- 2.6 Viruses, Viroids, Prions and Lichens
Free practice questions
Which of the following is NOT listed by NCERT as a plant viral symptom?
- A. Dwarfing and stunted growth
- B. Leaf rolling and curling
- C. Red tides
- D. Yellowing
Show answer
Answer: C — NCERT lists mosaic formation, leaf rolling/curling, yellowing, vein clearing, dwarfing and stunted growth. 'Red tides' is a dinoflagellate phenomenon, not a viral symptom.
NCERT Class 11 Biology · Ch 2 · 2.6 Viruses, Viroids, and Lichens
Which are the smallest living cells known?
- A. Nostoc
- B. Mycoplasma
- C. Diatoms
- D. Cocci
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Answer: B — The Mycoplasma are the smallest living cells known and can survive without oxygen.
NCERT Class 11 Biology · Ch 2 · 2.1 Kingdom Monera
Kingdom Plantae includes all eukaryotic organisms that contain which pigment?
- A. Anthocyanin only
- B. Melanin
- C. Chlorophyll
- D. Haemoglobin
Show answer
Answer: C — NCERT states Kingdom Plantae includes all eukaryotic chlorophyll-containing organisms commonly called plants.
NCERT Class 11 Biology · Ch 2 · 2.4 Kingdom Plantae
Which of the following correctly describes the habitat preference of euglenoids versus dinoflagellates?
- A. Euglenoids are mostly fresh water; dinoflagellates are mostly marine
- B. Euglenoids are mostly marine; dinoflagellates are mostly fresh water
- C. Both live only in hot springs
- D. Both are strictly terrestrial
Show answer
Answer: A — NCERT: euglenoids are majority fresh water (stagnant water) organisms, whereas dinoflagellates are mostly marine.
NCERT Class 11 Biology · Ch 2 · 2.2 Kingdom Protista
According to NCERT 2.5, animals grow into adults that have a:
- A. Shape that keeps changing throughout life
- B. Definite shape and size
- C. Indefinite, continuously increasing size
- D. Cell wall of chitin
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Answer: B — NCERT 2.5 states that animals follow a definite growth pattern and grow into adults that have a definite shape and size.
NCERT Class 11 Biology · Ch 2 · 2.5 Kingdom Animalia
In Ascomycetes, conidia on germination produce:
- A. Ascospores
- B. Zygospores
- C. Mycelium
- D. Basidia
Show answer
Answer: C — NCERT 2.3.2 states conidia on germination produce mycelium.
NCERT Class 11 Biology · Ch 2 · 2.3.2 Ascomycetes
The gametophytic phase in the life cycle of plants is:
- A. Prokaryotic
- B. Tetraploid
- C. Haploid
- D. Diploid
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Answer: C — NCERT: the life cycle has two distinct phases - the diploid sporophytic and the haploid gametophytic.
NCERT Class 11 Biology · Ch 2 · 2.4 Kingdom Plantae
Malaria is described in NCERT as a disease which has:
- A. A staggering effect on human population
- B. No effect on humans
- C. An effect only on plants
- D. Benefits for human health
Show answer
Answer: A — NCERT: malaria, a disease which has a staggering effect on human population.
NCERT Class 11 Biology · Ch 2 · 2.2 Kingdom Protista
Which of the following is a viral symptom in plants?
- A. Mosaic formation and leaf curling
- B. White spots on mustard leaves
- C. Citrus canker
- D. Wheat rust
Show answer
Answer: A — NCERT: In plants, the symptoms can be mosaic formation, leaf rolling and curling, yellowing and vein clearing, dwarfing and stunted growth.
NCERT Class 11 Biology · Ch 2 · 2.6 Viruses, Viroids, and Lichens
Which of the following pairs of Whittaker's kingdoms are studied along with Monera in this chapter?
- A. Plantae and Animalia
- B. Plantae and Protista
- C. Protista and Fungi
- D. Animalia and Fungi
Show answer
Answer: C — NCERT states that this chapter studies the characteristics of Kingdoms Monera, Protista and Fungi; Plantae and Animalia are dealt with in later chapters.
NCERT Class 11 Biology · Ch 2 · 2.1 Kingdom Monera
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