Which of the following is an osmoconformer?a) Freshwater fishb) Sea anemonec) Marine bony fishd) An anadromous fish

The correct answer is b) Sea anemone.

Osmoconformers are marine organisms that maintain an internal environment which is osmotic to their external environment. This means that they do not actively adjust their internal osmolarity (the concentration of a solution expressed as the total number of solute particles per liter), because it is the same as the seawater in which they live.

Sea anemones are a type of marine invertebrate. They are osmoconformers because they live in saltwater and their bodies are isotonic with the seawater, meaning they have the same concentration of solutes.

On the other hand, freshwater fish, marine bony fish, and anadromous fish (fish that migrate from the sea into fresh water to spawn, like salmon) are osmoregulators. They actively regulate the osmolarity of their body fluids regardless of the osmolarity of their environment. They have mechanisms to deal with the constant influx of water in a freshwater environment or the constant loss of water in a marine environment.