221: To uphold and protect the sovereignty, unity and integrity of India, a provision has been made in the:
(a) Directive Principles of State Policy
(b) Preamble to the Constitution
(c) Fundamental Duties
(d) Fundamental Rights
222: For India, China, the UK and the USA, which one of the following is the correct sequence of the median age of their populations?
(a) India < China < USA < UK
(b) China < India < UK < USA
(c) China < India < USA < UK
(d) India < China < UK < USA
223: Fruits stored in a cold chamber exhibit longer storage life because
(a) exposure to sunlight is prevented
(b) concentration dioxide in the is increased of carbon environment
(c) rate of respiration is decreased
(d) there is an increase in humidity
224: Stripes on the back of the animals are the indication of:
(a) Mating habit
(b) Food habit
(c) Cave dwelling
(d) Matching of skin colour with surroundings
225: Assertion (A) :
Human diet should compulsorily contain Glycrine, Serine and Tyrosin.
Reason (R) :
Essential amino acids cannot be synthesized in the human 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