A - A crop expressing a cry gene is usually r | vedclass

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(A) is true: Crops genetically modified to express $cry$ genes (e.g.,$Bt$ cotton) produce insecticidal proteins that provide resistance against specif

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Both $A$ and $R$ are true

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(A) is true: Crops genetically modified to express $cry$ genes (e.g.,$Bt$ cotton) produce insecticidal proteins that provide resistance against specific groups of insects,such as lepidopterans,coleopterans,and dipterans.$R$ is true: The bacterium $Bacillus$ $thuringiensis$ $(Bt)$ produces crystal $(Cry)$ proteins during its growth phase. These proteins exist as inactive protoxins in the bacteria but are converted into active toxins in the alkaline gut environment of susceptible insect larvae,leading to their death.

$A$ - $A$ crop expressing a $cry$ gene is usually resistant to a group of insects.
$R$ - $Cry$ proteins produced from $Bacillus$ $thuringiensis$ are toxic to the larvae of certain insects.

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$A$ - $A$ crop expressing a $cry$ gene is usually resistant to a group of insects.$R$ - $Cry$ proteins produced from $Bacillus$ $thuringiensis$ are toxic to the larvae of certain insects.