$Bt$ is resistant to .........

$Meloidogyne$ $incognita$,which infects the roots of tobacco plants causing a great reduction in yield,is a:

Consider the following statements about $Bt$:
$I.$ The bacteria $Bacillus$ $thuringiensis$ $(Bt)$ are used to control butterfly caterpillars.
$II.$ Fresh spores of $Bt$ are mixed with water and sprayed on crops 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?

Organisms whose genome has been altered by genetic engineering are called $GMOs$. What does $GMO$ stand for?

Blindness can be prevented by the use of which crop in poor countries?

$A$ 'new' variety of rice was patented by a foreign company, though such varieties have been present in India for a long time. This is related to