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Related Flashcards
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Cards In This Set
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What is the phylum/latin name for sponges?
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Porifera
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What are the 3 major classes for Cnidarians?
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Hydrozoa, Scyphozoa, and Anthozoa
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Give an example of the 3 major classes of Cnidarians.
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Hydrozoa- hydroids
Scyphozoa- jellyfish Anthozoa- anemones |
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What is the meaning for the latin name, Cnidaria?
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2 germ layers, no coelom
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Give examples for the Ph. Mollusca.
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Slugs, snails, chitons, bivalves, octopus, squid, nautilus
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What are the 4 major classes for Ph. Mollusca? (What does the latin name mean in english) and give an example of each.
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Polyplacophora- (many plates) chitons with many plates for shells
Bivalvia- (two shells) clams, mussels, oysters, scallops Gastropoda- (stomach foot) slugs, snails, whelks Cephalopoda- (head foot) octopus, squid, nautilus |
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What is torsion?
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180 degree counterclockwise twist of a shell, viscera, and mantle cavity relative to the head and foot.
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What is spiral coiling and what are the benefits of it?
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Results from the continuous torsion in advanced snails. It lengthens the digestive track to increase absorbtion efficiency.
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What are the 2 subclasses for Gastropoda?
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Prosobranchia (shelled snails)
opisthobranchia (sea slugs and nudibranchs) |
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What part of porifera is "numerous small incurrent pores"?
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Ostia
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What part of porifera is "large excurrent pores"?
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Oscula
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Ciliated cells produce inward current and filter plankton for food.
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Choanocytes (collar cells)
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What are 3 things Amoebocytes do?
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1. secrete spicules (skeleton)
2. produce gametes (eggs and sperm) 3. transport food and gametes |
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In what ways do porifera reproduce?
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Asexual- fragmentation
Sexual- internal fertilization. The sperm is released into the water and is captured internally by choanocyte and carried to the egg by an amoebocyte. Hermaphroditic (the same organism produces both sperm and eggs) |
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What are the 3 layers of Cnidarians?
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Ectoderm=epidermis (outer layer)
endoderm=gastrodermis (inner layer) mesoglea (middle jelly between layers) |
