64. Which among the following is an impact of heavy rainfall on soil?
Answer: It reduces the fertility
A
It decreases acidity and decreases fertility
B
It increases alkalinity and decreases fertility
C
It decreases alkalinity and decreases fertility
D
It reduces the fertility
Detailed Explanation
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Heavy rainfall can cause leaching and soil erosion, removing soluble nutrients and reducing soil fertility. In strongly leached regions, basic nutrients are also depleted.
66. Which of the following is the main reason for the extinction of wildlife?
Answer: All of these
A
Hunting
B
Poaching
C
End of habitat
D
All of these
Detailed Explanation
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Wildlife extinction is driven by several pressures, especially habitat loss, hunting and poaching. Thus the combined option captures the major direct causes listed.
Answer: Development without affecting future development
A
Development without affecting future development
B
Greater development of Industries
C
Agricultural development only
D
All of these
Detailed Explanation
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Sustainable development means meeting present needs without compromising the ability of future generations to meet their own needs. This definition comes from the Brundtland Report, 1987.
71. “Keibul Lamjao” the only floating national park in the world is located in?
Answer: Tripura
A
Ladakh
B
Tripura
C
Manipur
D
Mizoram
Detailed Explanation
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Keibul Lamjao National Park in Manipur is the world’s only floating national park. It is located on Loktak Lake and protects the endangered Sangai deer.