🧠 Solved Exercise | MCQs + Short Questions | With Answer Key

✅ SECTION 1: MULTIPLE CHOICE QUESTIONS – Answer Key

1. (b) Archaea

2. (b) Bacterial cell walls have peptidoglycan, while Archaeal cell walls do not have it.

3. (d) Protoctista

4. (c) Plantae

5. (b) The type of nucleic acid they contain

6. (d) Single-stranded RNA viruses

7. (c) Species diversity

8. (c) Transect Sampling

9. (c) Members of the same species are reproductively isolated from members of other species.

10. (c) Allopatric Speciation

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✍️ SECTION 2: SHORT QUESTIONS – Suggested Answers

Q1: What are the three domains of life and how do they differ in terms of cellular structure?
→ The three domains are Bacteria, Archaea, and Eukarya.

• Bacteria: Prokaryotic; cell walls with peptidoglycan.

• Archaea: Prokaryotic; lack peptidoglycan; ether-linked lipids; extremophiles.

• Eukarya: Eukaryotic; have membrane-bound organelles and a true nucleus.

Q2: Describe one key feature that differentiates Archaea from Bacteria.
→ Archaea lack peptidoglycan in their cell walls and have ether-linked membrane lipids.

Q3: Which kingdom is characterized by organisms with chitin in their cell walls and that are mostly decomposers?
→ Kingdom Fungi

Q4: What type of speciation occurs when populations are geographically separated?
→ Allopatric Speciation

Q5: What is the role of genetic drift in the process of speciation?
→ Genetic drift causes random changes in allele frequencies, especially in small populations, potentially leading to reproductive isolation and speciation.

Q6: What is the primary method used to assess species distribution along an environmental gradient?
→ Transect Sampling

Q7: Which level of biodiversity assessment involves evaluating the variety of ecosystems in a region?
→ Ecosystem diversity

Related Topics

• Class Mammalia
• Viruses& Clasification
• Biodiversity And Measurements