Biology 1200 exam 3

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zzto
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145239
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Biology 1200 exam 3
Updated:
2012-04-02 11:48:42
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Biology 1200 Exam
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Biology 1200 exam 3 notes
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  1. Study son!
  2. Body cavity (internal fluid filled space called
    acoelom)
  3. 1. Acoelomates have
    no body cavity
  4. 2. Pseudocoelmate have a
    body cavity partially lined with mesoderm
  5. 3. Coelomate
    coelom lies withinthe mesoderm
  6. Protostomes vs Deuterostomes
    • proto- pore becomes mouth
    • deuter- pore becomes anus
  7. Choanoflagellates are the sister taxon to animals. What proof is there?
    • 1. Morphology: collar cells of sponges
    • 2. More morphology: collar cells in other animals
    • 3. DNA sequence data; cell signaling & adhesion genes
  8. Why aren't chloanoflagellates animals?
    Choanflagellates are univercellular or colonial

    animals are multicellular
  9. Which clades elvoved multicellularity
  10. Tissue:
    Specialized group of cells with a common function; isolated from other tissues by membrane.
  11. Is the epidermal layer of sponges a true tissue?
    yes!
  12. Two variations to the body plan
    • 1. Polyp (sessile)
    • 2. Medusa (motile)

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