A. the sun is directly overhead the equator B. the sun is directly overhead the Tropic of Cancer C. the…
A. Mongolia and Tibet B. Sinkiang and Turkistan C. Kirghiz steppe D. All of the above
A. ultisols B. alfisols C. aridsols D. mollisols
A. Earth B. Jupiter and Saturn C. Mercury D. Earth, Jupiter and Saturn
A. eons B. epochs C. stages D. Any of the above
A. increase in area under wheat B. increase in yield per hectare C. increase in demand for wheat D. increase…
A. its electric charge B. its rest mass C. its energy D. All of these are its properties
A. nebula B. comet C. asteroid D. corona
A. Mesozoic B. cenozoic C. Triassic D. paleocene
A. South-east Asia including Australia, Africa, America B. Europe and South America C. Asia, Africa and Antarctica D. None of…