1976: Assertion (A) :
Insect resistant transgenic cotton has been produced by inserting Bt gene.
Reason (R) :
The Bt gene is derived from a bacterium.
(a) Both A and R are true, and R is the correct explanation of A
(b) Both A and R are true, but R is not a correct explanation of A
(c) A is true, but R is false
(d) A is false, but R is true
1977: Which of the following is/are the possible consequence/s of heavy sand mining in riverbeds ?
1. Decreased salinity in the river
2. Pollution of groundwater
3. Lowering of the water-table
Select the correct answer using the code given below :
(a) 1 only
(b) 2 and 3 only
(c) 1 and 3 only
(d) 1 ,2 and 3
1978: The satellites of which one of the following countries have helped in the preparation of a detailed and complete map of Antarctica ?
(a) Canada
(b) France
(c) Russia
(d) USA
1979: Based on the following statements, which is the correct conclusion drawn. Only gentlemen can become members of the club. Many of the members of the club are officers. Some of the officers have been invited for dinner.
(a) All the members of the club have been invited for dinner
(b) Some of the officers are not gentlemen
(c) All gentlemen are members of the club
(d) Only gentlemen have been invited for dinner
1980: The Himalayas are formed of parallel fold ranges, of which the oldest range is
(a) the Siwalik Range
(b) the Lesser Himalayas
(c) the Great Himalayan Range
(d) the Dhaula Dhar Range