AP BIOLOGY

Detailed explanation-1: -This is perfromed by ADH is also called arginine vasopressin. It’s a hormone made by the hypothalamusin the brain and stored in the posterior pituitary gland. It tells your kidneys how much water to conserve. ADH constantly regulates and balances the amount of water in your blood.

Detailed explanation-2: -Osmoregulation in plants under low water potential relies on synthesis and accumulation of osmoprotectants or osmolytes such as soluble proteins, sugars, and sugar alcohols, quaternary ammonium compounds, and amino acids, like proline.

Detailed explanation-3: -The correct answer is D. Osmoregulation involves the process of maintaining a relatively stable osmotic pressure in the fluids of an organism. This is done by controlling the water and salt concentrations in the body.

Detailed explanation-4: -In plants. While there are no specific osmoregulatory organs in higher plants, the stomata are important in regulating water loss through evapotranspiration, and on the cellular level the vacuole is crucial in regulating the concentration of solutes in the cytoplasm.