BSsq-lect25 mamm

BSsq-lect25 mamm - BIS 1B (Winter 2008) Study Questions:...

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BIS 1B (Winter 2008) Study Questions: Mammals Lecture 25 1. Four characteristics that mammals share in common with birds include: 2. Two characteristics that distinguish mammals from all other vertebrates include: 3. Mammals derive from a lineage of reptiles with a peculiar pelvic bone structure. What is this characteristic structure and how does it differ from that of extant reptiles and from birds? 4. Trace the chain of major events from fertilization of the mammalian (human) egg through birth. 5. What is the placenta, from what tissues does it derive and what are its functions? 6. How might the gestation period be lengthened in mammals? 7. Name 4 density dependent and 4 density dependent factors that may regulate human populations from time to time. 8. What are 4 characteristics that primates share in common and from what mammalian lineage do primates derive? 9. In mammals what are the functions of the residual gill arch bones that derive from the early primitive filter-feeding chordates? 10.
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BSsq-lect25 mamm - BIS 1B (Winter 2008) Study Questions:...

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