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The layer of the atmosphere in which Radio Waves are reflected back is called:
Who had used the term “Ecology” first time?
Who proposed Continental drift theory?
Frontal Rain is caused by:
Which one of the following pairs is not correctly matched?
The soil water which is of the greatest importance to the plant life is:
Which one of the following is the highest cloud?
In mountainous areas a natural cause for road blocks is often
What is the alternate name for contour lines?
What is a strait?