Which chemical could be used to show that the cells are respiring aerobically

i dont know it at allnow im just getting points at this pint

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

cuz some people don't have enough food. that's why we need more ppl to donate food to the hungry.