Environment, Ecology & Biodiversity MCQs

Environment, Ecology & Biodiversity Multiple choice questions for GK paper in SSC, NDA, CDS, UPSC, UPPSC and State PSC Examinations.

71. Arrange the main levels of organisation in ecology in sequence.
1. Ecosystem
2. Biome
3. Community
4. Biosphere
Select the correct option from the codes given below:

[A] 3-1-2-4
[B] 1-2-3-4
[C] 2-1-3-4
[D] 4-2-1-3

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72. Which of the following is the study of the interactions among a collections of species that inhabit the same geographic area?

[A] Ecosystem ecology
[B] Community ecology
[C] Population ecology
[D] None of the above

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73. Which of the following statements are correct?
1. Pyramid of numbers deals with the relationship between the numbers of primary producers and consumers at the lowest trophic level.
2. Pyramid of numbers is not always be upright, and can even be completely inverted.
Select the correct option from the codes given below:

[A] Only 1
[B] Only 2
[C] Both 1 & 2
[D] Neither 1 & 2

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74. Which of the following statements are correct with respect to biogeochemical cycling?
1. The elements or mineral nutrients are always in circulation moving from non-living to living and then back to the non-living components.
2. The living world is dependent upon the energy flow and the nutrients circulation that occurs through ecosystem.
Select the correct option from the codes given below:

[A] Only 1
[B] Only 2
[C] Both 1 & 2
[D] Neither 1 & 2

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75. Which of the following statements are correct with respect to Sedimentary Cycle?
1. Phosphorus, calcium and magnesium circulate by means of the sedimentary cycle.
2. The agents of sedimentary cycle include erosion, sedimentation, mountain building, volcanic activity and biological transport through the excreta of marine birds.
Select the correct option from the codes given below:

[A] Only 1
[B] Only 2
[C] Both 1 & 2
[D] Neither 1 & 2

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76. Which of the following are the characteristics of tropical dry evergreen forests?
1. Tropical dry evergreen forests consist of short statured trees, up to 12 m high, with complete canopy.
2. The important species in these forests include jamun, tamarind, neem, etc.
3. Most of the land under these forests has been cleared for agriculture or casuarina plantations.
Select the correct option from the codes given below:

[A] Only 1 & 2
[B] Only 2 & 3
[C] Only 1 & 3
[D] 1, 2 & 3

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77. Which of the following statements are correct regarding cold deserts?
1. The soil is cold deserts ranges from sandy to sandy loam.
2. The soil pH is neutral to slight alkaline.
3. Cold desert soils are rich in organic matter content.
4. Soil has low water retention capacity.
Select the correct option from the codes given below:

[A] Only 1, 2 & 3
[B] Only 2, 3 & 4
[C] Only 1, 2 & 4
[D] 1, 2, 3 & 4

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78. Estuaries are grouped into which of the following geomorphic categories based on the physical processes responsible for their formation?
1. rising sea level
2. movement of sand and sandbars
3. glacial processes
4. tectonic processes
Select the correct option from the codes give below:

[A] Only 1, 2 & 3
[B] Only 2, 3 & 4
[C] Only 1, 3 & 4
[D] 1, 2, 3 & 4

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79. At which of the following temperatures, Photosynthesis pathways in Zooxanthellae are impaired?

[A] 20 degree Celsius
[B] 25 degree Celsius
[C] 30 degree Celsius
[D] 35 degree Celsius

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80. Which of the following are the species of Orangutan?
1. Bornean
2. Sumatran 
3. Tapanuli
Select the correct option from the codes given below:

[A] Only 1 & 2
[B] Only 2 & 3
[C] Only 1 & 3
[D] 1, 2 & 3

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