In which part of the insect's body is the $pH$ alkaline?

Cultivation of $Bt$ cotton has been much in the news. The prefix $Bt$ means

Consider the following statements:
$I$. Flavr Savr is a genetically modified tomato,which remains fresh and retains its flavour much longer than the normal tomato due to the blocking of the synthesis of the fruit-softening enzyme polygalacturonase.
$II$. Recently,the $US$ government has patented the Indian 'basmati' rice as Rice-tec.
$III$. Viruses,bacteria,and some other harmful organisms can be used as bioweapons in biological warfare.
Which of the statements given above are correct?

$Bacillus \text{ } thuringiensis$ produces ......... that kill certain insects such as .........

For which variety of Indian rice was the patent filed by a $USA$ company?

Which disease-resistant cotton variety is developed using genetic engineering methods?