Controls what goes Fill in the blank: The
in and out of the cell.
cytoplasm
mitochondria
vacuole
cell membrane

Why is excretion necessary to maintain homeostasis?

In which situations is the principle of cross-cutting relationship useful in determining relative age?

The intervention of extraterrestrials has been used to explain the bermuda triangle, a region of the atlantic ocean where ships and planes are frequently lost, leaving no evidence behind. how would this explanation best be characterized?