Main constituent in air is ___________?
Main constituent in air is ___________?
A. Oxygen
B. Nitrogen
C. Hydrogen
D. Helium
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Which of the following ocean is the most polluted ocean of the world?
Which of the following ocean is the most polluted ocean of the world?A. Indian Ocean
B. North Pacific Ocean
C. Arctic Ocean
D. None of the aboveThe snow on the mountains does NOT melt all at once when it is heated by the sun because:
The snow on the mountains does NOT melt all at once when it is heated by the sun because:A. it becomes very hard
B. it reflects most of the heat from the sun
C. it has a low specific heat capacity
D. it has a high latent heat of fusionWhich of following contains cobalt?
Which of following contains cobalt?A. Vitamin K
B. Chlorophyll
C. Vitamin B12
D. HaemoglobinIt is observed that the total pressure exerted by air on the man of average size is around 14.7 lb wt. per square inch. But the man feels quite comfortable,. It is because of__________?
It is observed that the total pressure exerted by air on the man of average size is around 14.7 lb wt. per square inch. But the man feels quite comfortable,. It is because of__________?A. An equal and opposite pressure acts from inside
B. of the height of a man
C. of gravity
D. Earth pulls the man upward
E. None of theseDevelopment of calf muscles in ladies who wear high heel sandals is common example of ?
Development of calf muscles in ladies who wear high heel sandals is common example of ?A. Natural selection
B. Artificial selection
C. Use & disuse of organ
D. Inheritance of acquired characterNearest galaxy to our milky way is ________?
Nearest galaxy to our milky way is ________?
A. Messier 81
B. Andromeda
C. Triangulum
D. Whirlpool