Biology – Multiple Choice Questions (MCQs)

1. 49. What is biodiversity?

   • A. The variety of life in the world or in a particular habitat or ecosystem
   • B. The number of individual organisms in an ecosystem
   • C. The total mass of living organisms
   • D. The stability of an ecosystem

2. 50. What is conservation?

   • A. The protection and preservation of natural resources and the environment
   • B. The exploitation of natural resources for economic gain
   • C. The destruction of habitats
   • D. The introduction of invasive species

3. 51. What is pollution?

   • A. The contamination of the environment with harmful substances
   • B. The natural weathering of rocks
   • C. The growth of forests
   • D. The increase in biodiversity

4. 52. What is a disease?

   • A. A state of normal health
   • B. A disorder of structure or function in a living organism
   • C. A beneficial interaction between organisms
   • D. The process of growth and development

5. 53. What are pathogens?

   • A. Disease-causing microorganisms
   • B. Beneficial bacteria
   • C. Plant nutrients
   • D. Air pollutants

6. 54. What is immunity?

   • A. The ability of an organism to resist infection
   • B. The process of aging
   • C. The need for food and water
   • D. The ability to move

7. 55. What are vaccines?

   • A. Preparations that introduce weakened or inactive pathogens into the body to stimulate an immune response
   • B. Antibiotics used to treat bacterial infections
   • C. Antiviral drugs used to treat viral infections
   • D. Pain relievers

8. 56. What are antibiotics?

   • A. Drugs used to treat viral infections
   • B. Drugs used to treat bacterial infections
   • C. Drugs used to treat fungal infections
   • D. Drugs used to treat parasitic infections

9. 57. What is a virus?

   • A. A living cell
   • B. A non-living particle that can replicate only inside a living cell
   • C. A type of bacteria
   • D. A type of fungus

10. 58. What is a bacterium?

    • A. A eukaryotic microorganism
    • B. A prokaryotic microorganism
    • C. A type of virus
    • D. A type of fungus

11. 59. What is a fungus?

    • A. A photosynthetic organism
    • B. A prokaryotic organism
    • C. A eukaryotic organism that obtains nutrients by absorbing organic matter
    • D. A type of virus

12. 60. What is a plant?

    • A. A prokaryotic organism
    • B. A multicellular eukaryotic organism that produces its own food through photosynthesis
    • C. A type of fungus
    • D. A type of animal