AP BIOLOGY

Detailed explanation-1: -Osmoconformers are marine organisms that maintain an internal environment which is isotonic to their external environment. This means that the osmotic pressure of the organism’s cells is equal to the osmotic pressure of their surrounding environment.

Detailed explanation-2: -Osmoconformers change their body fluid osmolarity to match the concentration of the medium. Most of the marine invertebrates are osmoconformers. Osmoregulators: Osmoregulators maintain the osmolarity of body fluids despite changes in the medium. Osmoregulators survive better in brackish water than do osmoconformers.

Detailed explanation-3: -Osmoconformers are organisms that maintain their internal fluids iso-osmotic to their environment. That means they maintain an internal salinity similar to their ambient conditions. Most marine invertebrates including starfish, crabs, jellyfish, lobsters, sea squirts, and scallops are osmoconformers.

Detailed explanation-4: -Sharks belong to the class Chondrichthyes and are considered osmoconformers. They maintain an equal or isotonic salt concentration with the surrounding water. They have rectal glands that help in the regulation of osmotic pressure.

Detailed explanation-5: -Osmoconformers are organisms that keep their internal fluids isotonic to their environment, that is, they maintain an internal salinity similar to their ambient conditions (e.g., most marine invertebrates, seagrass). From: Encyclopedia of Ecology, 2008.