MCQOPTIONS
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MCQOPTIONS
This section includes 15 Mcqs, each offering curated multiple-choice questions to sharpen your Biology knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which phenomenon does the coevolved plant-pollinator mutualism explain? |
| A. | Co-extinction |
| B. | Fragmentation |
| C. | Invasion |
| D. | Loss of habitat |
| Answer» B. Fragmentation | |
| 2. |
Which phenomenon explains that ‘When a species becomes extinct, the plant and animal species also become extinct that are obligatorily associated with the host species’? |
| A. | Aquaculture |
| B. | Fragmentation |
| C. | Invasion |
| D. | Co-extinction |
| Answer» E. | |
| 3. |
Why was the African catfish Clarias gariepinus introduced? |
| A. | Horticulture |
| B. | Aquaculture |
| C. | Sericulture |
| D. | Poultry |
| Answer» C. Sericulture | |
| 4. |
What is Eicchornia called? |
| A. | The carrot grass |
| B. | Nile perch |
| C. | Water hyacinth |
| D. | Water lily |
| Answer» D. Water lily | |
| 5. |
Which of the following contains chemicals like parthenin, is toxic to cattle and cause pollen allergy in humans? |
| A. | Nile perch |
| B. | The carrot grass |
| C. | Rose |
| D. | Wheat |
| Answer» C. Rose | |
| 6. |
What happened when the Nile perch introduced into Lake Victoria in east Africa? |
| A. | Extinction of trees |
| B. | Increase in the number of trees |
| C. | Extinction of cichlid fish |
| D. | Increase in the number of cichlid fish |
| Answer» D. Increase in the number of cichlid fish | |
| 7. |
What happens when alien species are introduced unintentionally or deliberately? |
| A. | Decrease of alien species |
| B. | Increase in habitat |
| C. | They turn invasive and cause increase species |
| D. | They turn invasive and cause decline or extinction of indigenous species |
| Answer» E. | |
| 8. |
What was the reason for the exploitation of the Steller’s sea cow and the passenger pigeon? |
| A. | Competition |
| B. | Loss of habitat |
| C. | Human activities |
| D. | Mutualistic relationships |
| Answer» D. Mutualistic relationships | |
| 9. |
What are the excess and the unsustainable use of resources called? |
| A. | Loss of habitat and fragmentation |
| B. | Co-extinctions |
| C. | Invasion of alien species |
| D. | Over-exploitation |
| Answer» E. | |
| 10. |
Which animals are badly affected when a large habitat is broken up into small fragments due to various human activities? |
| A. | Extinct species |
| B. | Migratory species |
| C. | Non-migratory species |
| D. | Humans |
| Answer» C. Non-migratory species | |
| 11. |
Which of the following rain forest is known as ‘lungs of the planet’? |
| A. | The African rain forest |
| B. | The Australian rain forest |
| C. | The Amazon rain forest |
| D. | The Southeast Asian rain forest |
| Answer» D. The Southeast Asian rain forest | |
| 12. |
Currently, how much area of the Earth’s land surface is covered by the tropical rain forests? |
| A. | 90 % |
| B. | 50 % |
| C. | 1 % |
| D. | 6 % |
| Answer» E. | |
| 13. |
Previously how much of the Earth’s land surface was covered by the tropical rain forests? |
| A. | 50 % |
| B. | 14 % |
| C. | 24 % |
| D. | 35 % |
| Answer» C. 24 % | |
| 14. |
Which one of the following is said to be the most important cause or reason for the extinction of animals and plants? |
| A. | Loss of habitat and fragmentation |
| B. | Over-exploitation of species |
| C. | Invasion of alien species |
| D. | Co-extinctions |
| Answer» B. Over-exploitation of species | |
| 15. |
What does ‘The Evil Quartet’ describes? |
| A. | An increase in the number of species |
| B. | The decrease in the number of species |
| C. | Mass extinction |
| D. | Formation of the universe |
| Answer» C. Mass extinction | |