Which layer of the earth’s atmosphere reflect back the radio waves to the earth’s surface ?

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Which triplet in DNA codes for valine ?

A. CTT B. AGU C. CAT D. AAT E. None of these...

A moderator is used in nuclear reactor in order to ?

A. Accelerate the neutrons B. Slow down the speed of the neutrons C. Increase the number of elections D. Decrease the number of electrons E. None of these...

_______________ causes biomagnification problem in the Ecosystem.

Lead Mercury Chromium Copper...

The most magnificent and brightest star is ?

A: Sun B: Sirius C: Pistol D: Canopus...

Fat is digested in which part of body?

a) Small intestine  b) Mouth c) Large intestine d) Spleen...