The liberation of oxygen during photosynthesis is due to __________
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On the basis of distribution, resources can be classified into ____________?
Super cooling stands for cooling of a liquid :
A __________ thread is actually stronger than a steel wire.
"Personology" refers to _____.
Wheat is a ______.
Who was the first Indian astronomer to calculate the time taken by earth to orbit the sun?
Which of the following is appropriate to describe a Shooting Star?