841: Match List I with List II and select the correct answer using the codes given below the lists :
List I
I. Theory of Mutation
II. Theory of Evolution
III. One gene one enzyme hypothesis
IV. Operon concept
List II
(A) Beadk and Tatum
(B) Jacob and Monod
(C) Darwin
(D) De Vries
Codes:
(a) I-C, II-D, III-A, IV-B
(b) I-D, II-C, III-A, IV-B
(c) I-D, II-C, III-B, IV-A
(d) I-C, II-D, III-B, IV-A
842: Consider the following statements:
1. The discussions in the Third Round Table Conference eventually led to the passing of the Government of India Act of 1935
2. The government of India Act of 1935 provided for the establishment of an All India Federation to be based on a Union of the provinces of British India and the Princely States.
Which of the statements given above is/are correct?
(a) 1 only
(b) 2 only
(c) Both 1 and 2
(d) Neither 1 nor 2
843: With reference to food chains. In ecosystems, consider the following statements:
1. A food chain illustrates the order in which a chain of organisms feed upon each other.
2. Food chains are found within the populations of a species.
3. A food chain illustrates the numbers of each organism which are eaten by others.
Which of the statements given above is/are correct?
(a) 1 only
(b) 1 and 2 only
(c) 1, 2 and 3
(d) None
844: Assertion (A):
In the periodic table of chemical elements, electron affinity is always found to increase from top to bottom in a group.
Reason (R):
In a group, the atomic radial generally increase from top to bottom.
(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
845: Match List I (Ethnic Community) with List II (Country ) and select the correct answer using the codes given below the lists:
List I -- List II
(Ethnic community) -- (Country)
A. Apatani -- 1. China
B. Dayak -- 2. India
C. Dinka -- 3. Indonesia
D. Uighur -- 4. Sudan
Codes:
A B C D
(a) 2 3 4 1
(b) 3 2 4 1
(c) 2 3 1 4
(d) 3 2 1 4