The small organs of equilibrium in scyphozoan jellyfishes are called statocysts.
The statocyst is a sensory organ that consists of a sac-like structure which contains a mineralised mass (statolith) and numerous innervated sensory hairs-setae. When the animal accelerates, the statolith's inertia causes it to push against the setae and that’s the way to detect gravity.
-The small organs of equilibrium in scyphozoan jellyfishes are called statocysts, and these are borne in more complex sense organs called rhopalium.
The statocyst is a balance sensory receptor present in some aquatic invertebrates, including molluscs, bivalves, cnidarians,ctenophorans, echinoderms, cephalopods and crustaceans. These structures aid in orientation and balance during swimming in medusae and are located around the margin of the bell in Craspedacusta.
Sleep is an example. Circadian rythms are biological processes that repeats itself within a certain time frame, as sleep repeats itself approximately once every day.
(The result of DNA replication is two DNA molecules consisting of one new and one old chain of nucleotides. This is why DNA replication is described as semi-conservative, half of the chain is part of the original DNA molecule, half is brand new.)
