Current thinking on how the Toxoplasma gondii parasite invades its host is incorrect, according to a study published today in Nature Methods describing a new technique to knock out genes. The findings could have implications ...
Definition. Coral bleaching is a process whereby the coral colonies lose their colour, either due to the loss of pigments by microscopic algae (zooxanthellae) living in symbiosis with their host organisms (polyps), or because these zooxanthellae have been expelled.
Coral is a marine polyp with a calcareous skeleton that lives in colonies. You probably last saw coral while scuba diving at the Great Barrier Reef. That or while looking at the coral necklaces in the beach shop. Though coral looks like stone with little holes, it is actually a kind of sea polyp with a stony, hole filled skeleton. Sometimes the word coral refers to the skeleton itself. Because of the red color of Mediterranean coral, coral is also an adjective meaning pink-red. Shakespeare wrote: âMy mistress' eyes are nothing like the sun; Coral is far more âred than her lips' red.â Coral can also be a noun for unfertilized lobster eggs that turn red when cooking.