5 Demonstrações simples sobre grupo coral Explicado

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Certain species form communities called microatolls, which are colonies whose top is dead and mostly above the water line, but whose perimeter is mostly submerged and alive. Average tide level limits their height.

Octocorallia includes blue coral and soft corals and species of Octocorallia have polyps with an eightfold symmetry, each polyp having eight tentacles and eight mesenteries.

The zooxanthellae benefit from a safe place to live and consume the polyp's carbon dioxide, phosphate and nitrogenous waste. Due to the strain the algae can put on the polyp, stress on the coral often drives them to eject the algae. Mass ejections are known as coral bleaching because the algae contribute to coral coloration; some colors, however, are due to host coral pigments, such as green fluorescent proteins (GFPs). Ejection increases the polyp's chance of surviving short-term stress and if the stress subsides they can regain algae, possibly of a different species, at a later time.

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Some soft corals encrust other saiba mais sea objects or form lobes. Others are tree-like or whip-like and chem a central axial skeleton embedded at its base in the grupo coral matrix of the supporting branch.[nove] These branches are composed either of a fibrous protein called gorgonin or of a calcified material.

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Presently, corals are classified as certain species of animals within the sub-classes Hexacorallia and Octocorallia of the fonte class Anthozoa in the phylum Cnidaria.[6] Hexacorallia includes the stony corals and these groups have polyps that generally have a 6-fold symmetry.

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