Identify the correct statement.

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(A) $1$. $Bt$ cotton is a genetically modified crop that contains the $cry$ gene from the bacterium $Bacillus$ $thuringiensis$,which produces a toxic

Vedclass · Accepted Answer

$Bt$ cotton contains a toxic gene from $Bacillus$ $thuringiensis$.

Vedclass · Answer

(A) $1$. $Bt$ cotton is a genetically modified crop that contains the $cry$ gene from the bacterium $Bacillus$ $thuringiensis$,which produces a toxic protein that kills specific insect pests. Thus,statement $A$ is correct.$2$. $Baculoviruses$ (specifically $Nucleopolyhedrovirus$) are excellent biocontrol agents that are species-specific and narrow-spectrum,meaning they do not harm plants,mammals,or beneficial insects. Thus,statement $B$ is incorrect.$3$. $Bacillus$ $thuringiensis$ is a biopesticide,not a biofertilizer. Biofertilizers are organisms that enrich the nutrient quality of the soil (e.g.,$Rhizobium$,$Azospirillum$). Thus,statement $C$ is incorrect.$4$. $Oscillatoria$ is a cyanobacterium often used as a biofertilizer to fix atmospheric nitrogen in paddy fields,not as a biocontrol agent. Thus,statement $D$ is incorrect.

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