MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 47 Mcqs, each offering curated multiple-choice questions to sharpen your Environment & Ecology knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Consider the following statement about bioremediation.1. It may be defined as any process that uses microorganisms or their enzymes to return the environment altered by contaminants to its original condition.2. Bioremediation may be employed in order to attack specific contaminants, such as chlorinated pesticides that are degraded by bacterial.Which of the statements given above is/are correct? |
| A. | Only 1 |
| B. | Only 2 |
| C. | 1 and 2 |
| D. | Neither 1 nor 2` |
| Answer» D. Neither 1 nor 2` | |
| 2. |
Polar bears are carnivores and prey on many arctic birds and fishes. However, under natural conditions, no one found polar bears predating penguin. This is because |
| A. | penguins have chemical substance in their muscles which is toxic to polar bears |
| B. | penguins are gregarious and always move in groups. Therefore, a polar bear cannot approach them |
| C. | polar bears and penguins never coexist under natural conditions. The former lives in the North Pole white the latter lives in the South pole |
| D. | polar bears and penguins display symbiotic relationships and they help each other for their existence in the ice-cold ecosystem |
| Answer» D. polar bears and penguins display symbiotic relationships and they help each other for their existence in the ice-cold ecosystem | |
| 3. |
In a forest, animals like voles and woodlice feed on plant roots and barks respectively. Among the other carnivores, foxes, shrews and owls are present in that forest. Following predictions are made by a group of observers who have visited the forest.1. If the roots of the tree develop a disease, then voles and foxes will starve and not the owls.2. Population of voles is dependent on wood lice population through food web.3. If owl population declines, it will indirectly affect wood lice population.4. If barks of tree are affected due to a disease, then reduction of wood lice will affect the shrew population forcing owls to eat more voles.Which of the above predictions is/are correct? |
| A. | 1, 2 and 4 |
| B. | Only 3 |
| C. | 1 and 2 |
| D. | Only 2 |
| Answer» E. | |
| 4. |
Which among the following are the major reasons behind preferring eucalyptus tree in the planned forestation process?1. Plantation grows very fast2. Plantation makes the soil more fertile.3. Wood from eucalyptus tree is easily converted into the pulp for paper industry.Select the correct answer using the codes given below. |
| A. | 1 and 2 |
| B. | 1 and 3 |
| C. | 2 and 3 |
| D. | All of these |
| Answer» C. 2 and 3 | |
| 5. |
Which of the following plants is used for green manuring in India ? |
| A. | Wheat |
| B. | Sunnhemp |
| C. | Cotton |
| D. | Rice |
| Answer» C. Cotton | |
| 6. |
Which one of the following is a major constituent of biogas ? |
| A. | Carbon dioxide |
| B. | Methane |
| C. | Hydrogen |
| D. | Nitrogen dioxide |
| Answer» C. Hydrogen | |
| 7. |
In dry regions, the leaf size of a tree becomes smaller. It is so to |
| A. | reduce metabolism |
| B. | reduce transpiration |
| C. | maintain natural growth |
| D. | protect plant from animals |
| Answer» C. maintain natural growth | |
| 8. |
Which crop utilizes solar energy most efficiently? |
| A. | Potato |
| B. | Sugarcane |
| C. | Wheat |
| D. | Rice |
| Answer» C. Wheat | |
| 9. |
In nitrogen Cycle, soil nitrates are transformed into free nitrogen by |
| A. | nitrifying bacteria |
| B. | denitrifying bacteria |
| C. | ammonifying bacteria |
| D. | Both (a) and (c) |
| Answer» C. ammonifying bacteria | |
| 10. |
The use of microorganism metabolism to remove pollutants such as oil spills in the water bodies is known as |
| A. | biomagnification |
| B. | bioremediation |
| C. | biomethanation |
| D. | bioreduction |
| Answer» C. biomethanation | |
| 11. |
What is the primary source of food for marine life? |
| A. | Phytoplankton |
| B. | Zooplankton |
| C. | Sea weed |
| D. | Grass |
| Answer» B. Zooplankton | |
| 12. |
The orderly sequence of change in the vegetation of an area over time is described as |
| A. | biomes |
| B. | succession |
| C. | trophic level |
| D. | climax |
| Answer» C. trophic level | |
| 13. |
'Nitrosomonas' bacteria in the root modules of leguminous plants converts nitrogen gas from air into inorganic nitrogen compounds which enrich the soil and can be readily used by plants. Multiple cropping with legumes can thus significantly reduce the need for |
| A. | pesticides |
| B. | fertilizers |
| C. | irrigation |
| D. | All of these |
| Answer» C. irrigation | |
| 14. |
Under optional conditions, the fruit fly (Drosphilia) is capable of producing a new generation every two weeks.This ability is referred to as the ................... of the species. |
| A. | carrying capacity |
| B. | niche |
| C. | biotic potential |
| D. | optimal yeild |
| Answer» D. optimal yeild | |
| 15. |
A pesticide which is a chlorinated hydrocarbon is sprayed on a food crop. The food chain is : Food crop - Rat - Snake - Hawk. In this food chain, the highest concentration of the pesticide would accumulate in which one of the following? |
| A. | Food crop |
| B. | Rat |
| C. | Snake |
| D. | Hawk |
| Answer» E. | |
| 16. |
Which one among the following is not an endangered bird of India? |
| A. | White-bellied Heron |
| B. | Great Indian Bustard |
| C. | Forest Owlet |
| D. | Mallard |
| Answer» E. | |
| 17. |
The greatest diversity of animal and plant species occurs in |
| A. | tropical moist forests |
| B. | temperate deciduous forests |
| C. | desert and Savanna |
| D. | equatorial forests |
| Answer» E. | |
| 18. |
The loss of biodiversity is due to |
| A. | the destruction of natural habitats of organism |
| B. | environmental pollution |
| C. | destruction of forests |
| D. | All the above |
| Answer» E. | |
| 19. |
In a food chain, the solar energy utilized by plants is only |
| A. | 10% |
| B. | 0.01% |
| C. | 0.1% |
| D. | 1.0% |
| Answer» E. | |
| 20. |
The maximum biodiversity is found in |
| A. | tropical rain forests |
| B. | temperate forests |
| C. | coniferous forests |
| D. | arctic forests |
| Answer» B. temperate forests | |
| 21. |
Which of the following environmentalists first gave the concept of Biodiversity 'Hotspots' ? |
| A. | Julia Hill |
| B. | John Muir |
| C. | Norman Myers |
| D. | Gaylord Nelson |
| Answer» D. Gaylord Nelson | |
| 22. |
What term denotes the organisms getting their food from others ? |
| A. | Heterotrophs |
| B. | Autotrophs |
| C. | Producers |
| D. | Synthesizers |
| Answer» B. Autotrophs | |
| 23. |
Which one of the following is important strategy for the conservation of biodiversity ? |
| A. | Biosphere Reserves |
| B. | Botanical Gardens |
| C. | National Parks |
| D. | Wild Life Sanctuaries |
| Answer» B. Botanical Gardens | |
| 24. |
The amount of energy as it passes on from one trophic level to other in an ecosystem |
| A. | increases |
| B. | decreases |
| C. | remains constant |
| D. | none of these |
| Answer» C. remains constant | |
| 25. |
Polar bears |
| A. | penguins have chemical substance in their muscles which is toxic to polar bears |
| B. | penguins are gregarious and always move in groups. Therefore, a polar bear cannot approach them |
| C. | polar bears and penguins never coexist under natural conditions. The former lives in the North Pole white the latter lives in the South pole |
| D. | polar bears and penguins display symbiotic relationships and they help each other for their existence in the ice-cold ecosystem |
| Answer» D. polar bears and penguins display symbiotic relationships and they help each other for their existence in the ice-cold ecosystem | |
| 26. |
Consider the following statement about bioremediation. |
| A. | Only 1 |
| B. | Only 2 |
| C. | 1 and 2 |
| D. | Neither 1 nor 2` |
| Answer» D. Neither 1 nor 2` | |
| 27. |
Which one of the following is a major constituent of |
| A. | Carbon dioxide |
| B. | Methane |
| C. | Hydrogen |
| D. | Nitrogen dioxide |
| Answer» C. Hydrogen | |
| 28. |
Which among the following are the major reasons behind preferring |
| A. | 1 and 2 |
| B. | 1 and 3 |
| C. | 2 and 3 |
| D. | All of these |
| Answer» C. 2 and 3 | |
| 29. |
In a forest, animals like |
| A. | 1, 2 and 4 |
| B. | Only 3 |
| C. | 1 and 2 |
| D. | Only 2 |
| Answer» E. | |
| 30. |
The use of |
| A. | biomagnification |
| B. | bioremediation |
| C. | biomethanation |
| D. | bioreduction |
| Answer» C. biomethanation | |
| 31. |
Which crop utilizes |
| A. | Potato |
| B. | Sugarcane |
| C. | Wheat |
| D. | Rice |
| Answer» C. Wheat | |
| 32. |
What is the primary source of food for |
| A. | Phytoplankton |
| B. | Zooplankton |
| C. | Sea weed |
| D. | Grass |
| Answer» B. Zooplankton | |
| 33. |
'Nitrosomonas' |
| A. | pesticides |
| B. | fertilizers |
| C. | irrigation |
| D. | All of these |
| Answer» C. irrigation | |
| 34. |
Under optional conditions, the |
| A. | carrying capacity |
| B. | niche |
| C. | biotic potential |
| D. | optimal yeild |
| Answer» D. optimal yeild | |
| 35. |
A pesticide which is a chlorinated hydrocarbon is sprayed on a food crop. The |
| A. | Food crop |
| B. | Rat |
| C. | Snake |
| D. | Hawk |
| Answer» E. | |
| 36. |
Which one among the following is not an |
| A. | White-bellied Heron |
| B. | Great Indian Bustard |
| C. | Forest Owlet |
| D. | Mallard |
| Answer» E. | |
| 37. |
The greatest diversity of |
| A. | tropical moist forests |
| B. | temperate deciduous forests |
| C. | desert and Savanna |
| D. | equatorial forests |
| Answer» E. | |
| 38. |
The loss of |
| A. | the destruction of natural habitats of organism |
| B. | environmental pollution |
| C. | destruction of forests |
| D. | All the above |
| Answer» E. | |
| 39. |
In a food chain, the |
| A. | 10% |
| B. | 0.01% |
| C. | 0.1% |
| D. | 1.0% |
| Answer» E. | |
| 40. |
The orderly |
| A. | biomes |
| B. | succession |
| C. | trophic level |
| D. | climax |
| Answer» C. trophic level | |
| 41. |
Which of the following environmentalists first gave the concept of |
| A. | Julia Hill |
| B. | John Muir |
| C. | Norman Myers |
| D. | Gaylord Nelson |
| Answer» D. Gaylord Nelson | |
| 42. |
The minimum area of the land required to completely sustain the life one person is called his |
| A. | Biota |
| B. | Biome |
| C. | Ecological foot print |
| D. | Niche |
| Answer» D. Niche | |
| 43. |
What term |
| A. | Heterotrophs |
| B. | Autotrophs |
| C. | Producers |
| D. | Synthesizers |
| Answer» B. Autotrophs | |
| 44. |
Which one of the following is the most important factor responsible for decline of biodiversity? |
| A. | Genetic assimilation |
| B. | Controlling predators |
| C. | Destruction of habital |
| D. | Controlling pests |
| Answer» D. Controlling pests | |
| 45. |
Which one of the following is important strategy for the conservation of |
| A. | Biosphere Reserves |
| B. | Botanical Gardens |
| C. | National Parks |
| D. | Wild Life Sanctuaries |
| Answer» B. Botanical Gardens | |
| 46. |
The amount of |
| A. | increases |
| B. | decreases |
| C. | remains constant |
| D. | none of these |
| Answer» C. remains constant | |
| 47. |
Among the biotic components of the ecosystem the producer system is |
| A. | Cow |
| B. | Peacock |
| C. | Tiger |
| D. | Green plants |
| Answer» E. | |