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Chapter 2: Biological Classification

NCERT Solutions for CBSE Class 10 Biology — 27 solved questions with detailed explanations.

27

Questions

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Topics

Solved Questions

Q1. Kingdom Monera includes:

All prokaryotes
All eukaryotes
Only bacteria
Only archaea

Difficulty: Easy · Topic: Five Kingdoms

Solution

Kingdom Monera (Whittaker's classification) includes all prokaryotes: bacteria and archaea.

Q2. Lichens are a symbiotic association between:

Algae and fungi
Bacteria and fungi
Algae and bacteria
Two types of fungi

Difficulty: Easy · Topic: Symbiosis

Solution

Lichens = symbiosis between algae (or cyanobacteria, photobiont) and fungi (mycobiont). Algae provide food, fungi provide shelter.

Q3. Mycoplasma lacks:

DNA
cell wall
cell membrane
ribosomes

Difficulty: Easy · Topic: Biological Classification

Solution

cell wall.

Q4. Archaebacteria live in:

extreme environments
moderate environments
only soil
only water

Difficulty: Easy · Topic: Biological Classification

Solution

extreme environments.

Q5. Eubacteria have:

no cell wall
cellulose cell wall
chitin cell wall
peptidoglycan cell wall

Difficulty: Easy · Topic: Biological Classification

Solution

peptidoglycan cell wall.

Q6. Chrysophytes include:

paramecium
amoeba
euglena
diatoms

Difficulty: Easy · Topic: Biological Classification

Solution

diatoms.

Q7. Dinoflagellates appear:

green
blue
red (cause red tides)
yellow

Difficulty: Easy · Topic: Biological Classification

Solution

red (cause red tides).

Q8. Eubacteria cell wall has:

cellulose
chitin
no wall
peptidoglycan

Difficulty: Easy · Topic: Biological Classification

Solution

peptidoglycan.

Q9. Dinoflagellates can cause:

red tides
blue tides
no tides
green tides

Difficulty: Easy · Topic: Biological Classification

Solution

red tides.

Q10. Euglenoids have:

mixotrophic nutrition
only heterotrophic
chemosynthetic
only autotrophic

Difficulty: Easy · Topic: Biological Classification

Solution

mixotrophic nutrition.

Q11. Deuteromycetes are called:

imperfect fungi
club fungi
sac fungi
perfect fungi

Difficulty: Easy · Topic: Biological Classification

Solution

imperfect fungi.

Q12. R.H. Whittaker proposed:

three kingdom
five kingdom classification
two kingdom
six kingdom

Difficulty: Easy · Topic: Biological Classification

Solution

five kingdom classification.

Q13. Carl Woese proposed:

five kingdom
three domain classification
two kingdom
four kingdom

Difficulty: Easy · Topic: Biological Classification

Solution

three domain classification.

Q14. Mycoplasma is the smallest:

bacterium
living cell
protozoan
virus

Difficulty: Easy · Topic: Biological Classification

Solution

living cell.

Q15. Viroids consist of:

only RNA
protein + DNA
only DNA
protein + RNA

Difficulty: Easy · Topic: Biological Classification

Solution

only RNA.

Q16. Prions are:

viruses
fungi
bacteria
infectious proteins

Difficulty: Easy · Topic: Biological Classification

Solution

infectious proteins.

Q17. Kingdom Fungi cell wall contains:

murein
chitin
peptidoglycan
cellulose

Difficulty: Easy · Topic: Biological Classification

Solution

chitin.

Q18. Saprophytic fungi obtain nutrition from:

sunlight
dead organic matter
living organisms
minerals

Difficulty: Easy · Topic: Biological Classification

Solution

dead organic matter.

Q19. Parasitic fungi obtain nutrition from:

living host organisms
dead matter
sunlight
air

Difficulty: Easy · Topic: Biological Classification

Solution

living host organisms.

Q20. Viruses are considered non-living because they:

Have DNA
Can mutate
Cannot reproduce outside a host cell
Are very small

Difficulty: Easy-Medium · Topic: Viruses

Solution

Viruses are obligate intracellular parasites. They lack cellular machinery and cannot reproduce independently.

Q21. Whittaker's classification has:

6 kingdoms
2 kingdoms
5 kingdoms
3 kingdoms

Difficulty: Easy-Medium · Topic: Biological Classification

Solution

5 kingdoms.

Q22. Kingdom Fungi are:

photosynthetic
heterotrophic
autotrophic
chemosynthetic

Difficulty: Easy-Medium · Topic: Biological Classification

Solution

heterotrophic.

Q23. Bacteria reproduce mainly by:

budding
spore formation
binary fission
fragmentation

Difficulty: Easy-Medium · Topic: Biological Classification

Solution

binary fission.

Q24. Cyanobacteria are also called:

green algae
brown algae
red algae
blue-green algae

Difficulty: Easy-Medium · Topic: Biological Classification

Solution

blue-green algae.

Q25. Protista includes:

only plants
all prokaryotes
unicellular eukaryotes
only fungi

Difficulty: Easy-Medium · Topic: Biological Classification

Solution

unicellular eukaryotes.

Q26. Slime moulds belong to kingdom:

Protista (in Whittaker)
Fungi
Plantae
Monera

Difficulty: Easy-Medium · Topic: Biological Classification

Solution

Protista (in Whittaker).

Q27. TMV (Tobacco Mosaic Virus) has:

DNA
both RNA and DNA
neither
RNA

Difficulty: Easy-Medium · Topic: Biological Classification

Solution

RNA.

Other Chapters in Biology

Ch 1: The Living World Ch 3: Plant Kingdom Ch 4: Animal Kingdom Ch 5: Morphology of Plants Ch 6: Anatomy of Plants Ch 7: Structural Organisation in Animals Ch 8: Cell Unit of Life Ch 9: Biomolecules Ch 10: Cell Cycle Ch 11: Transport in Plants Ch 12: Mineral Nutrition Ch 13: Photosynthesis Ch 14: Respiration in Plants Ch 15: Plant Growth Ch 16: Digestion & Absorption Ch 17: Breathing & Gas Exchange Ch 18: Body Fluids & Circulation Ch 19: Excretory Products Ch 20: Locomotion & Movement Ch 21: Neural Control Ch 22: Chemical Coordination

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