Google and NASA have joined hands to identify which two new planets around Kepler 90?
In terms of size, Venus ranks no. ___ in our Solar System.
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ABM stands for ______.
In terms of size, Earth ranks no. ___ in our Solar System.
The Ozone layer is present in which atmospheric layer?
Name the scientist who proposed the cell theory
______ is the time taken by the earth to return to a given point in its orbit with reference to a fixed star.
Name the international treaty designed to protect the ozone layer from CFCs.
Non-green plants lack which of the following?