Lab Practical 7

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9 Terms

1
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Mammalia

apomorphies

  • endothermy (the ability to maintain internal body temperature via metabolism)

  • mammaries (modified sweat glands that produce milk; nutrition for offspring)

2
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Monotremata

apomorphies

  • loss of adult teeth

3
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Theria

apomorphies

  • viviparity (baby develops in the uterus and takes nutrition from mother)

  • cloaca lost (there are seperate anal and urethal openings)

4
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Marsupialia

apomorphies

  • marsupium (ventral pouch, young carried & fed)

5
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Placental

apomorphies

  • chorolallantoic placenta (embryo nourished from chorion and allantois)

  • corpus callosum (connection between two halves of brain cerebrum)

  • more completely (developed at birth no pouch)

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Mammalia Apomorphies

endothery, mammarie glands, hair

7
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Monotremata Apomorphies

loss of adult teeth, oviparous (eggs), no nipples

8
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Marsupialia Apomorphies

choriovitelline placenta, marsupium

9
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Placcentalia Apomorphies

corpus callosum, chorolallantoic placenta, more completly developed at birth (no pouch)