681: The maturity of a river course is recognised by the presence of
(a) V-shaped valley
(b) Meanders
(c) Gorges
(d) High denudational power
682: The Himalayan Range is very rich in species diversity, Which one among the following is the most appropriate reason for this Phenomenon?
(a) It has a high rainfall that supports luxuriant vegetative growth
(b) It has less human interference
(c) Exotic and invasive species have riot been introduced in this region
(d) It is a confluence of different bio-geographical zones
Explanation:
The confluence of different bio-geographical zones like Mediterranean, Indo-Chinese etc. is the major reason for the rich species diversity of Himalayan Range. Hence option D is the answer.
683: Match List-I (New Names of the Countries) with List-II (Old Names of the Countries) and select the correct answer using the codes given below the Lists :
List-I List-II
(New Names ) (Old Names )
A. Benin 1. Nyasaland
B. Belize 2. Basutoland
C. Botswana 3. Bechuanaland
D. Malawi 4. British Honduras
5. Dahomey
Codes:
A B C D
(a) 3 1 2 4
(b) 5 4 3 1
(c) 3 4 2 1
(d) 5 1 3 4
Explanation:
Benin is the new name of Dohomey
Belize is the new name of British Honduras
Botswana is the new name of Bechuanaland
Malawi is the new name of Nyasaland
684: Caldera is a feature associated with
(a) Volcanoes
(b) Earthquakes
(c) Folding of rocks
(d) Faulting of mountains
685: Match List-I with List-II and select the correct answer using the codes given below the lists:
List I (City)
(A) Washinton D.C.
(B) Berlin
(C) Paris
(D) Madrid
List II (River)
1. River Manzanares
2. River Seine
3. River Spree
4. River Potomac
(A) 2 1 4 3
(B) 2 3 4 1
(C) 4 1 2 3
(D) 4 3 2 1
Explanation:
Washington D.C. - River Potomac
Berlin - River Spree
Paris - River Seine
Madrid - River Manzanares