Gene expression can be controlled with the help of  $\rm {RNA}$ . Explain the method with an example.

Golden rice is a genetically modified crop plant where the incorporated gene is meant for biosynthesis of

Crystals of $Bt$ toxin produced by some bacteria do not kill the bacteria themselves because

Assertion : Insect resistant transgenic cotton has been produced by inserting $Bt$ gene.

Reason : The $Bt$ gene is derived from a bacterium.

Which of the following statements is/are correct?

$I.$ Chemical fertilizers cause pollution of water bodies as well as groundwater, besides getting stored in crop plants. Therefore, environmental scientists are pressing for a switch over to organic farming.

$II.$ Organic farming is a form of agriculture that relies on techniques such as crop rotation, green manure, compost and biological pest Select the correct statement