If deletion of a control element causes an increase in gene expression, what must be the normal role of that control element

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

options?

explanation:

answerconditioned response;