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The basic chemical building block of natural rubber obtained from trees is
The basic unit of biosystematics is
The best colour(s) for a sun umbrella will be
The best conductor of electricity among the following is:
The best conductor of electricity is
The best material for the core of a transformer is
The bimetallic strip in a thermostat consists of brass and iron. When the strip is heated, it bends into an arc with brass on the convex side and iron on the concave side of the arc. This happens because
The blotting technique used to identify the isolated protein is _
The blue colour of sky is due to the phenomenon of
The blue colour of the water in the sea is due to
