Bis2C%20Lecture2029%20Fall%202010

Bis2C%20Lecture2029%20Fall%202010 - Fall 2010 Lecture 29....

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Fall 2010 Lecture 29. Bilateria introduction to Bilateria introduction to Protostomes brief description of flatworms Students should be able to: define a eumetazoan describe the major features of bilaterians describe the two major clades within Bilateria outline the distinguishing developmental features of protostomes recognize the 3 classes of flatworms compare and contrast the role of asexual reproduction in cnidarians and flatworms
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Fossil embryo dated about 600 mya. Eumetazoa arose ~650 mya Increase in diversity and turnover of assemblages of eukaryotes at “Ediacaran transition” is linked to the presence of a layer of oxygenated ocean water. Science 328, 2 April 2010 p.53-54.
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Ediacaran animals
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Given that the clade Eumetazoa comprises all animals except sponges, which of the following traits are apparent synapomorphies of Eumetazoa? 1. Formation of blastula 2. Diploblastic construction 3. Diplontic life cycle 4. 1 and 3 5. 1 and 2
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Bis2C%20Lecture2029%20Fall%202010 - Fall 2010 Lecture 29....

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