When Bacillus thuringiensis enters a certain insect's body, the insect gets killed, but itself remains unaffected. Explain how it is possible.

Bacillus thuringiensis has been used to kill certain insects such as

How has the bacterium Bacillus thuringiensis helped us in controlling caterpillars of insect pests?

Consider the following statements about transgenic tobacco palnt. I. Transgenic tobacco plants contains a gene from a bacterium, Bacillus thuringiensis. II. Bt gene is an insecticidal protein which damages the inner lining of the insects and kills it (insect). III. The tobacco plants having Bt gene produces their own insecticide. Which of the statements given above are correct ?

In the case of Bacillus thuringiensis , Bacillus itself is not killed by toxic protein crystals produced by it because

In case of Bacillus thuringiensis, Bacillus itself is not killed by the toxic protein crystals produced by it because Bt toxin:

Which gene isolated from Bacillus thuringiensis has been known to control the insect population of corn borer?