341: The increasing amount of carbon dioxide in the air is slowly raising the temperature of the atmosphere, because it absorbs
(a) the water vapour of the air and retains its heat
(b) the ultraviolet part of the solar radiation
(c) all the solar radiations
(d) the infrared part of the solar radiation
342: The sex of the offspring is determined, when:
(a) The conception takes place
(b) The sperm fertilises the ovum
(c) The embryo is partially developed
(d) The end of gestation period is near
343: The educated middle class in India
(a) opposed the revolt of 1857
(b) supported the revolt of 1857
(c) remained neutral to the revolt of 1857
(d) fought against native rulers
344: A lot of details, regarding the village administration under the Cholas is provided by the Inscriptions at
(a) Thanjavur
(b) Uraiyur
(c) Kanchipuram
(d) Uttaramerur
345: It takes one minute to fill 3/7 th of a vessel. What is the time taken in minutes to fill the whole of the vessel ?
(a) 4/3
(b) 3/4
(c) 7/3
(d) 3/2