1311. The minimum land area recommended for forest cover to maintain propoer ecological balance is:
1312. The theory that refers to an explosion about 10 to 15 billion years ago, which hmost astronomers believe to be the origin of universe, is called
A.the red shift theory
C.big bang theory *
1313. Which of the following rivers do not flow in Africa?
1314. Margalla hills in and around Islamabad is branch of:
A.hara korum range
B.hindu kush range
C.himalyas range *
1315. East timor, is now independent country, before independence it was part of ________
1316. Kosovo, is now independent country, before its independence it was a part of which of the following countries?
1317. On the day of summer solstice in the northern hemisphere, the length of day-time on the Antarctic circle is _________
C.zero hours *
1318. Day and nights are of equal duration on March 21 at _______
A.the tropic of cancer alone
B.the tropical of equator alone
C.the tropic of capricorn alone
D.all parallel of latitude *
1319. “Ring of fire” refers to the ring of volcanoes present in:
A.ring of earthquakes
B.five permanent members of UN
C.circum-pacific seismic belt *
1320. Which of the following is the oldest rock?