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14 Cards in this Set
- Front
- Back
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Epidermis
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ectoderm
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Gastrodermis
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endoderm
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Mesoglea (different from mesohyl, but still not a true tissue or tissue layer, hence cnidarians are ___.
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diploblastic
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Basic body plan is that of a double layered sac which forms a ____ ____ with single opening that functions as mouth and anus
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gastrovascular cavity
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Presence of tentacles with stinging cells called_______ and ______.
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cnidocytes (cell) and nematocysts
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Generation that reproduces sexually
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Medusa
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Generation that reproduces asexually
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Polyp
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Hydroids (both polyp and medusa stages present)
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Class Hydrozoa
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Hydroids include a group of complex colonial forms called _____.
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Siphonophores (e.g. Physalia, the Portuguese Man-of-War)
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Jellyfish (medusa stage dominant)
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Class Scyphozoa
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Aurelia aurata
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Moon Jelly
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Chironex fleckeri
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Box Jelly
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Anemones, corals, sea pens, sea fans (polyp stage dominant)
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Class Anthozoa
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Important builders of coral reefs (along with the calcareous red algae in some areas) in tropical waters where water temperature does not drop below 70 F,salinity is greater than 30‰, and water is clear and less than 30 m deep (to provide sufficient light for zooxanthellae).
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Stone (hermatypic) corals
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