Bio 204 lab practical 7 (lab 15)
1. strong, webbed forefeet: How are the forefeet of a platypus well adapted for both swimming and
digging its nest burrows?
2. Theria: What lineage is Monotremata sister taxon to?
3. No, they are oviparious (egg laying): Are monotremes viviparious (give birth to live young)?
4. female marsupials have a ventral pouch in which the young are carried and
fed: What is unique about reproduction in marsupials relative to other mammals?
5. - males with external gonads
- females w/nipples
- pinnae well developed
- expanded grey matter in brain
1/6
,- cloaca lost
- viviparious: What apomorphic character states do marsupials share with placentals?
6. prolonged embryonic development takes place in the uterus: What is unique about
the embryonic development of placentals?
7. no: Are Xenartha actually all "edentate"?
8. no character can be given to distinguish insectivores from all other mammals-
: In Boreoeutheria, how are the teeth modified for an insectivorious diet?
9. one upper premolar & one lower molar on each side modified into shearing
blades, called carnassials: In Boreoeutheria, how have some of the molars and premolars been modified
to aid in carnivory?
10. teeth have become simplified as spikes for catching fish: In Boreoeutheria, how are
the teeth modified for a fish eating diet?
2/6
, 11. metacarpals & phalanges: In chiroptera, which bones of the forelimbs have been greatly elongated
to aid in flight?
12. ...: What bones form the wing in the bird?
13. convergent as wings (similarity due to convergent evolution): Are the wings of bats
and birds homologous or convergent?
14. homologous as bones (similarity due to shared ancestry): Are the bones in the wings
of bats and birds homologous or convergent?
15. rootless, evergrowing, and self sharpening: What is unique about the upper and lower
incisors of rodents?
16. for cooling: In desert dwelling rabbits and hares, what functions do the elongate ears serve?
3/6
1. strong, webbed forefeet: How are the forefeet of a platypus well adapted for both swimming and
digging its nest burrows?
2. Theria: What lineage is Monotremata sister taxon to?
3. No, they are oviparious (egg laying): Are monotremes viviparious (give birth to live young)?
4. female marsupials have a ventral pouch in which the young are carried and
fed: What is unique about reproduction in marsupials relative to other mammals?
5. - males with external gonads
- females w/nipples
- pinnae well developed
- expanded grey matter in brain
1/6
,- cloaca lost
- viviparious: What apomorphic character states do marsupials share with placentals?
6. prolonged embryonic development takes place in the uterus: What is unique about
the embryonic development of placentals?
7. no: Are Xenartha actually all "edentate"?
8. no character can be given to distinguish insectivores from all other mammals-
: In Boreoeutheria, how are the teeth modified for an insectivorious diet?
9. one upper premolar & one lower molar on each side modified into shearing
blades, called carnassials: In Boreoeutheria, how have some of the molars and premolars been modified
to aid in carnivory?
10. teeth have become simplified as spikes for catching fish: In Boreoeutheria, how are
the teeth modified for a fish eating diet?
2/6
, 11. metacarpals & phalanges: In chiroptera, which bones of the forelimbs have been greatly elongated
to aid in flight?
12. ...: What bones form the wing in the bird?
13. convergent as wings (similarity due to convergent evolution): Are the wings of bats
and birds homologous or convergent?
14. homologous as bones (similarity due to shared ancestry): Are the bones in the wings
of bats and birds homologous or convergent?
15. rootless, evergrowing, and self sharpening: What is unique about the upper and lower
incisors of rodents?
16. for cooling: In desert dwelling rabbits and hares, what functions do the elongate ears serve?
3/6
