Why leaves of touch-me-not closed down on touching

The leaves close under various other stimuli, such as touching, warming, blowing, or shaking. ... The stimulus can also be transmitted to neighboring leaves. It is not known exactly why Mimosa pudica evolved this trait, but many scientists think that the plant uses its ability to shrink as a defense from herbivores

format change of dna.  

the eggs of the insects should be the first thing collected at the scene.

false