What is one benefit of lifelong physical activity?
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Heavy water is
The blue colour of the clear sky is due to
Which insect sits on uncovered food?
Both flies and bees can sit on the uncovered food and contaminate the food.
On what basis Greek thinker Aristotle classified the animals for the first time?
The fastest growing plant is ______ ?
Water soluble vitamin include
NASA successfully tested supersonic landing parachute in November 2017 for its approximate ______ mission.