This is Environment and Ecology GS Practice part 2.  Keep visiting Environment and Ecology section in UPSC category of our website for learning more about the subject.

Que 6 – The Himalayan Range is very rich in species diversity. Which one among the following is most appropriate reason for phenomenon? (UPSC CSE 2011)

(a) It has a high rainfall that supports luxuriant vegetative growth.

(b) It is a confluence of different bio-geographical zones.

(c) Exotic and invasive species have not been introduced in this region.

(d) It has less human interference.

Answer – (b)

Explanation :

Himalaya rides abruptly in eastern side as compared to Western Himalaya.
Himalaya and Indo Burma – 2 diversity hotspot zone in Himalayan vicinity.

Que 7 – Consider the following :
1. Carbon Dioxide
2. Oxides of Nitrogen
3. Oxides of Sulphur

Which of the following above is/are emission/emissions from coal combustion at thermal power plant? (UPSC CSE 2011)

(a) 1 only

(b) 2 and 3 only

(c) 1 and 3 only

(d) 1, 2 and 3

Answer – (d)

Explanation :

All gases are released by a thermal power plant.
Thermal power plant and steel power plant are the two most polluting heavy industries.

Que 8 – The formation of Ozone hole in Antarctic region has been a cause of concern. What could be the reason for the formation of this hole?(UPSC CSE 2011)

(a) Presence of prominent tropospheric turbulence and inflow of chlorofluorocarbons.

(b) Presence of prominent polar front and stratospheric clouds and inflow of chlorofluorocarbons.

(c) Absence of polar front stratospheric clouds and inflow of methane and chlorofluorocarbon.

(d) Increased temperature at polar region due to global warming.

Answer – (b)


Ozone depleting substances like chlorofluorocarbon transported to the stratosphere release Halogen atoms through photodissociation.

Que 9 – Regarding “Carbon Credits” which one of the following statement is not correct?(UPSC CSE 2011)

(a) The carbon credit system words ratified in conjunction with the Kyoto protocol.

(b) Carbon Credits are awarded to countries or groups that have reduced greenhouse gases below their emission quota.

(c) The goal of the carbon credit system is to limit the increase of carbon dioxide emission.

(d) Carbon Credits are traded at a price fixed form time to time by the United Nations Environment Programme.

Answer – (d)

Explanation :

This question can be solved with logic if you don’t know about the Carbon credits.
Common sense say that trading would happen at various exchanges across the the world and not fixed by one institution.

Que 10 – The ” Red Data Books” published by the international union for conservation of nature and natural resources (IUCN) contain list of : (UPSC CSE 2011)

1. Endemic plant and animal species present in biodiversity hotspot.

2. Threatened plant and animal species.

3. Protected sites for conservation of nature and natural resources in various countries.

Select the correct answer using the codes given below :

(a) 1 and 3

(b) 2 only

(c) 2 and 3

(d) 3 only

Answer- (b)

Explanation :

The IUCN Red list of Threatened Species in the world’s most comprehensive inventory of the global conservation status of plant and animal species.
It uses a set of criteria of evaluate the extinction risk of thousand of species and subspecies.
These criteria are relevant to all species and all region of the world.

You can study about Environment and Ecology topic at our Environment and Ecology for Govt Exams article.  Also, you can keep preparing for Environment and Ecology GS Practice Part 2.

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