(1) they keep toxic substances out of the cell;
(2) they contain receptors and channels that allow specific molecules, such as ions, nutrients, wastes, and metabolic products, that mediate cellular and extracellular activities to pass between organelles and between the cell and the outside environment;
(3) they separate vital but incompatible metabolic processes conducted within organelles.
Answer - Ground water erosion is a type of carbonic acidic water. That goes into the holes thru the soil and pretty much cracks thru rocks.
An area in the South region Babylonian in present - day Iraq
The chief City of ancient Mesopotamia and capital of the ancient kingdom of Babylonia
Many living organisms respond to things in the environment called Stimuli.
