The ways and means devised by organisms to multiply their number.
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Q2.Fill in the blanks
(i) The speed of light in air is _______.
(ii) White Light is _______ of colours.
(iii) The melting point of pure ice is ______ Kelvin.
(iv) _______ is the faster mode of transfer of heat.
(v) Convention cannot take place in _______.
(vi) The sound is a _______ wave.
(vii) The persistence of hearing is _______.
(viii) Each source of sound is a ________ body.
(ix) A _______ is a source of electricity.
(x) The flow of current in a wire is called _______.
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