U Name the membrane valves that open and close for potassium efflux and sodium
influx. (B. C.1-Cells: Structure and Function) *
lon channels
Vacuoles
Capillaries
Cytokines
Organisms living in regions where canli

i believe the answer is a or 1

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