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The name "Anthozoa" comes from the Greek words άνθος (ánthos; "flower") and ζώα (zóa; "animals"), hence ανθόζωα (anthozoa) = "flower animals", a reference to the floral appearance of their perennial polyp stage. [1] Anthozoans are exclusively marine, and include sea anemones, stony corals, soft corals, sea pens, sea fans and ...
Monotropa uniflora, an obligate myco-heterotroph known to parasitize fungi belonging to the Russulaceae. [1]Myco-heterotrophy (from Greek μύκης mýkes ' fungus ', ἕτερος héteros ' another ', ' different ' and τροφή trophé ' nutrition ') is a symbiotic relationship between certain kinds of plants and fungi, in which the plant gets all or part of its food from parasitism upon ...
Some gorgonians contain algae, or zooxanthellae. This symbiotic relationship assists in giving the gorgonian nutrition by photosynthesis. Gorgonians possessing zooxanthellae are usually characterized by brownish polyps. Gorgonians are found primarily in shallow waters, though some have been found at depths of several thousand feet.
Octocorallia (also known as Alcyonaria) is a class of Anthozoa comprising over 3,000 species [1] of marine organisms formed of colonial polyps with 8-fold symmetry. It includes the blue coral , soft corals , sea pens , and gorgonians (sea fans and sea whips) within three orders: Alcyonacea, Helioporacea, and Pennatulacea. [ 2 ]
G. ventalina is a filter feeder.Each polyp extends its eight tentacles to catch plankton drifting past on the current. Its tissues contain symbiotic dinoflagellate Symbiodinium spp., which are photosynthetic and use sunlight to create organic carbon compounds which are then available to the host coral.
They reproduce for approximately 1.5 years, growing about 3 cm 2 per year. [7] In addition, Tubastraea form runners that can extend 10.4 centimeters (4.1 in) per year, until they reach unoccupied areas, then forming polyps at the end of the runner. [8] Reproduction occurs sexually during the summer, spring, and winter seasons.
Most possess a unique form of organelle structure that comprises a type of non-photosynthetic plastid called an apicoplast—with an apical complex membrane. The organelle's apical shape (e.g., see Ceratium furca) is an adaptation that the apicomplexan applies in penetrating a host cell. The Apicomplexa are unicellular and spore-forming.
The primary endosymbiotic event of the Archaeplastida is hypothesized to have occurred around 1.5 billion years ago [26] and enabled eukaryotes to carry out oxygenic photosynthesis. [27] Three evolutionary lineages in the Archaeplastida have since emerged in which the plastids are named differently: chloroplasts in green algae and/or plants ...
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