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BSsq-lect22 amphirepts

BSsq-lect22 amphirepts - What is paedomorphosis How do the...

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BIS 1B (Winter 2008) Study Questions: Amphibians and Reptiles Lecture 22 1. One of the biggest problems in evolving a terrestrial existence is the conservation of water. Compare the ways in which amphibians and reptiles have solved this problem? 2. What are the advantages and disadvantages of an amniotic egg versus giving birth to life young? What do the terms oviparous, ovoviviparous, and viviparous mean? 3. Define the term “neoteny” and give an example of neoteny from the Class Amphibia. What is the difference between neoteny and progenesis? Give an example of progenesis from the Subphylum Urochordata.
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Unformatted text preview: What is paedomorphosis? How do the terms neoteny and progenesis relate to paedomorphosis? How do all these terms relate to the process of heterochrony? 4. Which type of egg was partially responsible for the success of the terrestrial vertebrates? a. amniotic b. allantoic c. aquatic d. shelled e. miracidial 5. What features of the environment favor the switch from external to internal fertilization in terrestrial vertebrates? 6. Name at least two classes in different phyla where the transformation among life cycle stages occurs by metamorphosis rather than by asexual production of the new stage....
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