The first known practically functioning telescope was invented in __________ at the beginning of the 17th Century.
a) U.S.A
b) U.S.S.R
c) Netherland
d) England
Each surface of a lens is a part of a sphere, the center of which is called as:
a) Optical Center
b) Center of Curvature
c) Focal point
d) Principal focus
A typical human chromosome contains _____ millions nucleotides in its DNA.
a) 140
b) 150
c) 160
d) 170
An average adult human body has about_______ liters of blood.
a) 4
b) 5
c) 6
d) 7
__________ is the only disease that has been completely wiped out throughout the world.
a) Small pox
b) Chicken pox
c) Measles
d) Cholera
Natural gas consists primarily of:
a) Methane
b) Ethane
c) Butane
d) Propane
