The scientific process by which crop plants are enriched with certain desirable nutrients is called
crop protection
breeding
bio-fortification
bio-remediation
$A$......... infects the roots of tobacco plants which reduce the production of tobacco.
Consider the following statements about $B t$
$I.$ The bacteria Bacillusthuringiensis $(B t)$ are used to control butterfly catterpillers
$II.$ Fresh spores of $B t$ are mixed with water and sprayed on seeds such as brassicas and fruit trees
$III.$ Insect larvae, after eating these are killed by the toxin released in their gut
$IV.$ Bt toxin genes have been introduced into plants to provide resistance to pests
Which of the statements given above are correct?
Which bacteria was the first to be used as biopesticide on the commercial scale in the world?
........... gene control the corn borer.
What is true about $Bt$ toxin?