Answers of DPPGE: 20 February

1. Consider the following statements regarding Jet Stream:

i. The temperature difference between two air masses and earth’s rotation cause the jet stream

ii. The greater the temperature difference between the air masses, the faster the wind blows in the jet stream.

iii. Subtropical Jet Streams are weaker then Polar Jet Stream

iv. The Northern Hemisphere and the Southern Hemisphere each have a polar jet and a subtropical jet.

Correct statements are:

a) i, ii and iii

b) ii, iii and iv

c) i, ii and iv

d) All

Ans: c

2. Match the following:

List- I          List- II

A. Llanos          i. Tropical grassland plain

B. Pampas         ii. Grassland of South Africa

C. Selvas           iii. Tropical rain forest

D. Veld               iv. Fertile lowland grassland of South America

Codes:

A  B  C  D

a) ii  iii   iv   i

b) i  ii   iii  iv

c) iv  ii   iii   i

d) i  iv   iii   ii

Ans: d

3. Consider the following statements regarding Savanna:

i. It is also called Sudan type climate.

ii. It is characterized by an alternate hot, rainy season and cold, dry season.

iii. Diurnal range of temperature is very narrow.

iv. It is only found in Africa.

v. Savanna landscape is a tropical grasslands which is typified by tall grass and short trees.

Incorrect statement/s is/are:

a) i and ii

b) iii an iv

c) ii, iv and v

d) i and iv

Ans: b

4. Choose the incorrect statement about Madden Julian Oscillation (MJO):

a) MJO is an ocean-atmosphere interactions that occur in the equatorial region and influence a number of weather events worldwide, including the Indian monsoon.

b) Strong MJO activity, like last year, is witnessed in a year of strong El Nino.

c) MJO is an westward moving system of wind, cloud and pressure that brings rain as it circles around the equator.

d) Strong MJO activity often splits the planet in to two — one in which the MJO is in active phase and brings rainfall, and the other in which it suppresses rainfall.

Ans: c

It is eastward moving system of wind.

5. Which of the following is/are true about Viviparous mode of reproduction:

A. It is found in mangroves.

B. In this type of reproduction, seeds germinate before they detach from the parent.

Choose the correct statement:

a) Only A

b) Only B

c) Both A and B

d) Neither A nor B

Ans: c

6. Which of the following is/are true about Cetaceans?

i. These are type of fish.

ii. These are mammals living in water which have no hind limps and a blow hole for breathing.

iii. Dolphins, Porpoises and Whales are Cetaceans.

a) ii and iii

b) i, ii and iii

c) i and ii

d) i and iii

Ans: a

7. Match the following:

List-I (Ramsar Sites)      List-I (States)

A. Harike Wetland        i. Tripura

B. Tsomoriri                  ii. Jammu Kashmir

C. Chandra Taal            iii. Punjab

D. Rudrasagar Lake     iv. Himachal Pradesh

Codes:

A    B     C    D

a) iv    i     iii   ii

b) iii    ii    iv    i

c)  i     ii     iii   iv

d)  ii    iii    iv    i

Ans: b

8.The National Tiger Conservation Authority has recently accorded final approval to a proposal to declare National Park/s to tiger reserve/s. National Park/s is/are:

a) Kudremukh National Park in Karnataka

b) Rajaji National Park in Uttarakhand

c) Both a and b

d) None

Ans: c

9.  Which of the following statement is incorrect:

a) Eutrophication is the enrichment of an aquatic system by the addition of nutrients.

b) Eutrophication may lead to death of fishes and other aquatic organisms.

c) Eutrophication can only be natural.

d) Eutrophication can cause algal bloom.

Ans: c

It can be natural as well as man made.

10. Which of the following statement is correct?

a) Strait of Bob-el Mandeb joins the Persian Gulf and Gulf of Oman.

b) Strait of Harmuz joins Red Sea and Gulf of Aden.

c) Amur River lies on the border of Russia and China

d) Strait of Gibraltar joins Mediterranean Sea and Red Sea

Ans: c