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Cards In This Set
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The concentration of the nerve tissue at the anterior end is called __________.
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Cephalization
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Which phylum contains the polyp and medusa body forms?
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Cnidaria
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What are the three tissue layers and where is each one generally located?
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Ectoderm = outer, mesoderm = middle and endoderm = inner
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Name and define the two types of symmetry and give an example of an animal that has each type.
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Radial - parts arranged around a central axis; ex = jellyfish. Bilateral - body plan w/left and right sides mirroring each other; ex = butterfly.
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What is the difference between a coelom and a pseudocoelom and why is having a coelom an advanced trait?
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Pseudocoelom - the body cavity forms between inner and middle layer; coelom - the body cavity forms within the middle layer. It provides a space for a fluid filled area to protect and support the organs.
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Both the Echinodermata and Cnidaria have __________ symmetry.
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Radial
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What is the only phylum that has a pseudocoelom?
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Nematoda
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Name the two phyla that have segmentation and state why this triat is an advantage.
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Arthropoda and Annelida; it allows specialization of certain parts of the body
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Name four things that appendages can be used for in invertebrates.
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Movement, feeding, sense of touch/smell and reproduction
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State why a tube-in-tube body plan is more advanced than a sac-like one and name all of the phyla that use the tube-intube plan.
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Tube is more efficient at getting nutrients and the Nematoda, Annelida, Mollusca, Arthropoda and Echinodermata have this plan.
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Tapeworms are flatworms in the ____________________ phylum.
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Platyhelminthes
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Hookworms and heartworms are in the phylum __________.
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Nematoda
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Name two organisms found in the phylum Annelida and two in the phylum Cnidaria.
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Leeches, tubeworms & earthworms and jellyfish, hydra & coral
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Name three organisms in the phylum Echinodermata and three in the phylum Mollusca.
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Starfish, sand dollar, sea cucumber & sea urchin and clams, mussels, octopus, squid, slugs & snails
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Name three classes of arthropods and an example of an organism from each.
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Insecta - bee, ant, grasshopper; Arachnida - spider, tick, scorpian; Crustacea - shrimp, crab, lobster
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