Google and NASA have joined hands to identify which two new planets around Kepler 90?
A __________ thread is actually stronger than a steel wire.
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_________ affect the rate of humus formation of soil.
Fabric made from_________ does not get wrinkled easily.
The method of soil conservation in which rocks are piled up to slow down the flow of water which prevents gullies and further soil loss is called?
_____________ is the number of individuals of the same species that have come into the habitat from elsewhere during the time period under consideration.
Around how much percent of earth's surface is covered with water?
Which of the following is the cleanest source of energy?
One of the best solutions to get rid of nonbiodegradable waste is