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Are amniotes a monophyletic group?
yes
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Mammals have what type of skull?
synapsid
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Lizards, snakes, turtles, crocodiles & birds have what type of skull?
diapsid
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What type of skull was the ancestral form?
anapsid
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What was the function of the temporal fenestra?
muscle attatchment associated with elevating the mandible
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What are the adatations of amniotes?
- 1. tough (Beta-keratin) water-resistant skin (lipids)
- 2. Amniotic egg
- 3. internal fertilization & copulatory organs
- 4. lungs w/ more surface area & aspirated with ribs and associated with muscles
- 5. efficient & flexible cardiovascular system
- 6.uric acid excretion
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Why is having Amniotic eggs beneficial of amniotes?
allows terrestrials reproduction, faster growing & longer embryo, mineral storage & support
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Turtles belong to what order?
testudines
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Incomplete seperation of __________ allows for ___ bypass when diving or in dormancy
cardiovascular system, lung
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How is sex determined in turtles?
warm temps produce females and colder temps produce males
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What order and class do lizards and snakes belong too?
Class reptillia, order squamata
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what are some differences in snakes and lizards?
- lizards: moveable eyelid, external ear opening, limbs
- snakes: no limbs, no eyelid
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