A bird introduced form one country to another became a serious pest due to

a bird introduced from another country become a serious pest due to

Assertion. Seeds and plant samples of only genetically superior and cultivated species are introduced from one country to another. Reason. The cultivated species find a direct use in the crop improvement programmes of the importing country.

Water passes into a cell or one cell to another due to

A motor converts one form of energy into another. Name the two forms.