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Vidaara.orgClass 11 · Mathematics
CodeVID-M11-WS
Biological Classification — Practice Worksheet
Chapter: Biological Classification
Topic: Biological Classification
Maximum Marks: 27
Time: 30 minutes
Name: ____________________ Roll No.: __________ Date: ____________

General Instructions

  • All questions are compulsory.
  • Choose the correct option (A, B, C or D) for each question.
  • The answer key is at the end — try the paper first!
Section A — Multiple Choice (1 mark each) 15 × 1 = 15 marks
1.
The Five Kingdom Classification was proposed by:
  • A.Linnaeus
  • B.R.H. Whittaker
  • C.Aristotle
  • D.Ernst Haeckel
2.
Which kingdom contains all the prokaryotes?
  • A.Protista
  • B.Fungi
  • C.Monera
  • D.Plantae
3.
Methanogens, halophiles and thermoacidophiles are examples of:
  • A.Eubacteria
  • B.Archaebacteria
  • C.Protozoans
  • D.Fungi
4.
Photosynthetic blue-green algae that can also fix nitrogen are the:
  • A.Mycoplasma
  • B.Cyanobacteria
  • C.Slime moulds
  • D.Diatoms
5.
The bacteria that lack a cell wall completely are:
  • A.Cyanobacteria
  • B.Mycoplasma
  • C.Archaebacteria
  • D.Bacillus
6.
Kingdom Protista is made up of:
  • A.Single-celled eukaryotes
  • B.Prokaryotes
  • C.Multicellular plants
  • D.Multicellular animals
7.
Diatoms have cell walls made of:
  • A.Chitin
  • B.Silica
  • C.Cellulose only
  • D.Protein
8.
Red tides in the sea are caused by:
  • A.Euglenoids
  • B.Slime moulds
  • C.Dinoflagellates
  • D.Diatoms
9.
Euglena is considered mixotrophic because it:
  • A.Only photosynthesises
  • B.Photosynthesises in light but is heterotrophic in the dark
  • C.Has a cell wall of chitin
  • D.Is a prokaryote
10.
Plasmodium, which causes malaria, belongs to which protozoan group?
  • A.Amoeboid
  • B.Flagellated
  • C.Ciliated
  • D.Sporozoans
11.
The thread-like filaments that make up a fungal body are called:
  • A.Hyphae
  • B.Cilia
  • C.Pellicles
  • D.Capsids
12.
The cell wall of fungi is made of:
  • A.Cellulose
  • B.Silica
  • C.Chitin
  • D.Peptidoglycan
13.
A lichen is a symbiotic association between a fungus and a/an:
  • A.Virus
  • B.Alga (or cyanobacterium)
  • C.Animal
  • D.Protozoan
14.
Viruses are made of a protein coat enclosing:
  • A.Only protein
  • B.Nucleic acid (DNA or RNA)
  • C.Chitin
  • D.Silica
15.
Prions are infectious agents made of:
  • A.Abnormally folded protein only
  • B.Free RNA only
  • C.DNA and protein
  • D.Cellulose
Section B — Challenge / Olympiad (2 marks each) 6 × 2 = 12 marks
16.
Why was Linnaeus's two-kingdom system replaced by the Five Kingdom system?
  • A.It grouped very different organisms (e.g. bacteria, fungi, plants) together
  • B.It had too many kingdoms
  • C.It ignored animals
  • D.It was based on size only
17.
Diatomaceous earth is useful for filtration because the diatom walls are:
  • A.Made of fine, hard, indestructible silica
  • B.Soft and dissolve in water
  • C.Made of protein
  • D.Made of chitin
18.
Mycoplasma can survive in conditions that kill many other bacteria partly because it:
  • A.Lacks a cell wall and can live without oxygen
  • B.Has the thickest cell wall
  • C.Is photosynthetic
  • D.Is a eukaryote
19.
Lichens are absent from heavily polluted cities, which makes them useful as:
  • A.Pollution indicators
  • B.Food crops
  • C.Antibiotics
  • D.Fertilisers
20.
A virus crystallised and stored on a shelf shows no life signs, yet multiplies inside a host. This shows that viruses are:
  • A.On the borderline between living and non-living
  • B.Always non-living
  • C.Prokaryotes
  • D.Fungi
21.
Penicillin, an antibiotic, and the leavening of bread are both contributions of which kingdom?
  • A.Fungi
  • B.Monera
  • C.Protista
  • D.Animalia

Answer Key

Section A — Multiple Choice (1 mark each)
  1. (B) R.H. Whittaker
  2. (C) Monera
  3. (B) Archaebacteria
  4. (B) Cyanobacteria
  5. (B) Mycoplasma
  6. (A) Single-celled eukaryotes
  7. (B) Silica
  8. (C) Dinoflagellates
  9. (B) Photosynthesises in light but is heterotrophic in the dark
  10. (D) Sporozoans
  11. (A) Hyphae
  12. (C) Chitin
  13. (B) Alga (or cyanobacterium)
  14. (B) Nucleic acid (DNA or RNA)
  15. (A) Abnormally folded protein only
Section B — Challenge / Olympiad (2 marks each)
  1. (A) It grouped very different organisms (e.g. bacteria, fungi, plants) together
  2. (A) Made of fine, hard, indestructible silica
  3. (A) Lacks a cell wall and can live without oxygen
  4. (A) Pollution indicators
  5. (A) On the borderline between living and non-living
  6. (A) Fungi
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