4496: Assertion (A) :
Drinking of whisky increases the frequency of urination.
Reason (R) :
Alcohol intake speeds up the secretion of vasopressin in the body.
(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 a correct explanation of A
(c) A is true but R is false
(d) A is false but R is true
4497: Consider the following statements:
1. INS Sindhughosh is an aircraft carrier.
2. INS Viraat is a submarine.
Which of the statements given above is/are correct?
(a) 1 only
(b) 2 only
(c) Both 1 & 2
(d) Neither 1 nor 2
4498: Which one of the following is not correctly matched ?
(a) Isopleth : A line joining places of equal height
(b) Isobar : A line joining places of equal pressure
(c) Isohyet : A line joining places of equal rainfall
(d) Isotherm : A line joining places of equal temperature
4499: What is the role of ultraviolet (UV) radiation in the water purification systems?
1. It inactivates/kills the harmful micro-organism in water.
2. It removes all the undesirable odours from the water.
3. It quickens the sedimentation of solid particles, removes turbidity and improves the clarity of water.
Which of the statements given above is/are correct?
(a) 1 only
(b) 2 and 3 only
(c) 1 and 3 only
(d) 1, 2 and 3
4500: Which one of the following is the best description of the term 'ecosystem'?
(a) A community of organisms interacting with one another.
(b) That part of the Earth which is inhabited by living organisms.
(c) A community of organisms together with the environment in which they live
(d) The flora and fauna of a geographical area