Poop. I don't really know what you are asking but the excretory system removes the stuff from our stomach that we cant use or stuff that already has all of the nutrients that we need removed. Hope this helps
Gravitational attraction between two celestial objects (i think)
D) DNA,messenger RNA,and Transfer RN
I think the answer might be B.
Ultraviolet radiation may increase when there is an increase in sunspots
