Which part of the tobacco plant is infected by $Meloidogyne \ incognita$?

How is biotechnology useful for increasing food production in agriculture?

The bacterium $Bacillus$ $thuringiensis$ is widely used in modern biology as a/an:

Main objective of production/use of herbicide resistant $GM$ crops is to
$(A)$ -Reduce herbicide accumulation in food articles for health safety.
$(B)$ -Eliminate weeds in the field without the use of herbicides.
$(C)$ -Eliminate weeds from the field without the use of manual labour.
$(D)$ -Soil pollution and biomagnification caused by herbicides.
Which of the following statements are correct?

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

What are carbamates used as?