9th class Biology, Chapter 2: Biodiversity MCQs

1. Which of the following taxonomic ranks represents the broadest rank?

1. (A) Species
2. (B) Genus
3. (C) Kingdom
4. (D) Domain ✓

2. Which characteristic is unique to organisms in the domain Archaea?

1. (A) Cell walls made of peptidoglycan
2. (B) Presence of a nucleus
3. (C) Ability to live in extreme environments ✓
4. (D) Lack of ribosomes

3. Which of the following is a key characteristic that distinguishes eukaryotic cells from prokaryotic cells?

1. (A) Lack of a cell wall
2. (B) Presence of a nucleus ✓
3. (C) Absence of ribosomes
4. (D) Smaller size

4. Why it is impossible to classify viruses within traditional biological kingdoms?

1. (A) They lack cellular structure and organelles. ✓
2. (B) They cannot perform photosynthesis.
3. (C) They are smaller in size than bacteria.
4. (D) They are parasites.

5. Which of the following is the correct way for writing the scientific name of humans?

1. (A) Homo sapiens (typed in italics) ✓
2. (B) Homo sapiens (typed in plain letters)
3. (C) Homo Sapiens
4. (D) homo sapiens

6. Biodiversity means:

1. (A) the variety of organisms in a particular area ✓
2. (B) the number of plants only
3. (C) the study of fossils
4. (D) the size of an ecosystem

7. Which regions have more biodiversity?

1. (A) Tropical regions ✓
2. (B) Polar regions
3. (C) Both have equal biodiversity
4. (D) Regions with no soil

8. The United Nations has designated ____ as International Biodiversity Day.

1. (A) 22nd May ✓
2. (B) 5th June
3. (C) 22nd March
4. (D) 1st January

9. Out of about two million known kinds of organisms, how many kinds are animals?

1. (A) 0.5 million
2. (B) 1.5 million ✓
3. (C) 1 million
4. (D) 2 million

10. The process of dividing organisms into groups and subgroups on the basis of similarities and differences is called:

1. (A) Classification ✓
2. (B) Nutrition
3. (C) Reproduction
4. (D) Evolution

11. The system of taxonomic ranks was devised by:

1. (A) Carl Linnaeus ✓
2. (B) Ronald Ross
3. (C) Laveran
4. (D) Mendel

12. The Linnaean system of taxonomic ranks was devised in:

1. (A) 1735 ✓
2. (B) 1835
3. (C) 1977
4. (D) 1635

13. The rank of domain was added to the Linnaean system in:

1. (A) 1735
2. (B) 1977 ✓
3. (C) 1900
4. (D) 2000

14. The lowest level of classification is:

1. (A) Genus
2. (B) Family
3. (C) Species ✓
4. (D) Order

15. A species is a group of similar organisms that can:

1. (A) live in water only
2. (B) interbreed and produce fertile offspring ✓
3. (C) make their own food
4. (D) live in extreme environments

16. In plants and fungi the rank "phylum" is called:

1. (A) Division ✓
2. (B) Class
3. (C) Order
4. (D) Family

17. The genus of the fruit fly is:

1. (A) Drosophila ✓
2. (B) Homo
3. (C) Pisum
4. (D) Diptera

18. Which domain contains the most primitive organisms on Earth?

1. (A) Archaea ✓
2. (B) Bacteria
3. (C) Eukarya
4. (D) Plantae

19. The cell wall of bacteria is made of:

1. (A) chitin
2. (B) cellulose
3. (C) peptidoglycan ✓
4. (D) polypeptides only

20. Archaebacteria that produce methane as a by-product of metabolism are called:

1. (A) Halophiles
2. (B) Thermophiles
3. (C) Methanogens ✓
4. (D) Acidophiles