Mention any one point of difference between pepsin and trypsin.

Pepsin is an enzyme which acts only in acidic medium ,trypsin is an enzyme which acts in alkaline medium

all these collisions do one thing, and that thing is explained in the last option. when dusst, rocks and ice collide, they harden and form giant layers of rocks or hard ice.

d)   to harden materials to form different parts of earth’s layers

hope it ,

bioteacher101