Biology CLEP Prep Practice Exam

Osmoregulation is the process of maintaining a balance of water and solutes in an organism, while transpiration is the process of water loss through plants. Decomposition is the breakdown of organic matter by bacteria and fungi. Osmosis is the movement of water molecules across a semi-permeable membrane. None of these processes involve the elimination of excess water from an organism, making them all incorrect options. Therefore, the correct answer is D, osmoregulation.