The greatest threat to genetic diversity in agricultural crops is

$DNA$ fingerprinting method is very useful for:

Which of the following is present in maximum amount in acid rain?

$A$ circular loop of radius $0.3 \ cm$ lies parallel to a much bigger circular loop of radius $20 \ cm$. The centre of the small loop is on the axis of the bigger loop. The distance between their centres is $15 \ cm$. If a current of $2.0 \ A$ flows through the smaller loop,then the flux linked with the bigger loop is:

Which of the following is not a type of cancer?

Which one of the following reactions represents the oxidising property of $H_2O_2$?