UPSC 2011 › Environment & Ecology › Water & Wetland Conservation

2 questions · 2011 · answers as per the UPSC key

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UPSC 2011 · Q47 · Environment & Ecology › Water & Wetland Conservation · Save

There is a concern over the increase in harmful algal blooms in the seawaters of India. What could be the causative factors for this phenomenon?

  1. Discharge of nutrients from the estuaries.
  2. Run-off from the land during the monsoon.
  3. Upwelling in the seas.

Select the correct answer from the codes given below:

(a) 1 only
(b) 1 and 2 only
(c) 2 and 3 only
(d) 1, 2 and 3
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Answer: (d) 1, 2 and 3
UPSC 2011 · Q76 · Environment & Ecology › Water & Wetland Conservation · Save

The 2004 Tsunami made people realize that mangroves can serve as a reliable safety hedge against coastal calamities. How do mangroves function as a safety hedge?

(a) The mangrove swamps separate the human settlements from the sea by a wide zone in which people neither live nor venture out
(b) The mangroves provide both food and medicines which people are in need of after any natural disaster
(c) The mangrove trees are tall with dense canopies and serve as an excellent shelter during a cyclone or tsunami
(d) The mangrove trees do not get uprooted by storms and tides because of their extensive roots
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Answer: (d) The mangrove trees do not get uprooted by storms and tides because of their extensive roots