621: Neolithic period of age is not characterised by:
(a) Agriculture
(b) Use of copper
(c) Domestication of animals
(d) Fishing
622: Many transplanted seedlings do not grow because
(a) the new soil does not contain favourable minerals
(b) most of the root hairs grip the new soil too hard
(c) most of the root hairs are lost during transplantation
(d) leaves get damaged during transplantation
623: The major chemical compound found in human kidney stones is
(a) Uric acid
(b) Calcium carbonate
(c) Calcium oxalate
(d) Calcium sulphate
624: Which one of the following statements is not correct ?
(a) Neel Darpan was a play based on the exploitation of the indigo farmers
(b) The author of the play Ghashiram Kotwal is Vijay Tendulkar
(c) The play Navanna by Nabin Chandra Das was based on the famine of Bengal
(d) Urdu theatre used to depend heavily on Parsi theatre
625: Assertion (A) :
Areas near the equator receive rainfall throughout the year.
Reason (R) :
High temperatures and high humidity cause convectional rain in most afternoons near the equator.
In the context of the above two statements, which one of the following is correct ?
(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