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16 Cards in this Set
- Front
- Back
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Porifera lack _____ _____
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true tissues
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There are around _____ species of Porifera
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5500
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True/False:
Porifera don't move... |
True.
Porifera are sessile. |
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The cell fate of Porifera is never determined. This is called ____________...
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Totipotency
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Name the 4 cell types in Porifera and give a short description of them.
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1) Pinococytes
Surface layer of cells 2) Porocytes Surround ostial openings 3) Amoebocytes Food transport and structural support. Produce *spicules* 4) Choanocytes (i.e. collar cells) By beating flagella, the choanocytes create a current that draws water in through the porocytes. |
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Asexual reproduction in sponges is performed via. __________...
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Gemmules
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Some economic uses of sponges might be...
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*In short, have been used to help treat many diseases*
Pacific Sponge => Inspired development of Cytarabine - used to treat lymphoma Caribbean sponge => development of antiretroviral agent AZT Bahamian deep-sea sponge => Discodermalide, stage II anti-cancer drug at Novartis Many sponges => manzamines, effective in treating malaria |
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Cnidaria have __________ symmetry.
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Radial
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Are Cnidaria Diploblastic or Triploblastic?
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Diploblastic
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What type of gut do Cnidarians have?
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A blind gut.
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The name for organelles enclosed in cnidocyte cells used to sting and subdue prey
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Nematocysts
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A unique type of marine animal that can eat cnidocysts and use them for their own defense are called __________.
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Kleptocnidae
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Cnidaria have an alternating life cycle where they go through both a __________ stage and a _________ stage.
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Polyp
Medusa |
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The 4 classes of Cnidaria are:
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Cubozoa
Anthozoa Scyphozoa Hydrozoa |
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Describe the 4 classes of Cnidaria in terms of their respective Medusa and Polyp stages.
Name an organism from each group. |
Cubozoa - Box shaped Medusa
Box jelly, or sea wasp Anthozoa - Polyp stage only Sea anemones, corals Scyphozoa - Medusa stage dominant, Polyp reduced Jellies, sea nettles Hydrozoa - Polyp stage dominates, Medusa reduced. Man-o-War |
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A jellyfish walked into a hardware shop...
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...and bought ten drills.
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