4056: Within biological communities, some species are important in determining the ability of a large number of other species to persist in the community. Such species are called
(a) Keystone species
(b) Allopatric species
(c) Sympatric species
(d) Threatened species
4057: Doldrums refer to:
(a) A belt of calm and light variable winds near the equator
(b) A particular area in the centre of the Pacific Ocean
(c) The region of the upper atmosphere extending upward from the tropopause to about 20 kms. above the earth
(d) None of these
4058: Assertion (A):
Areas lying within five to eight degrees latitude on either side of the equator receive rainfall throughout the year.
Reason (R):
High temperatures and high humidity cause convectional rain to fall mostly in the afternoons near the equator.
(a) Both A and R are individually true and R is the correct explanation of A
(b) Both A and R are individually true but R is NOT the correct explanation of A
(c) A is true but R is false
(d) A is false but R is true
4059: Which one of the following statements is true according to 1991 Census data?
(a) U.P. has the highest density of population in India
(b) Himachal Pradesh has the highest female to male sex ratio in India
(c) West Bengal has the highest growth rate of population in India
(d) Bihar has the lowest literacy rate in India
4060: With reference to the religious history of medieval India, the Sufi mystics were known to pursue which of the following practices?
1. Meditation and control of breath
2. Severe ascetic exercises in a lonely place
3. Recitation of holy songs to arouse a state of ecstasy in their audience
Select the correct answer using the codes given below :
(a) 1 and 2 only
(b) 2 and 3 only
(c) 3 only
(d) 1, 2 and 3