CHAPTER 17 Flashcards
1
Q
pharyngeal slits/pouches become what
A
gills
2
Q
Lateral line system
A
Lateral line system
3
Q
Lobe-finned fish are what
A
weight bearing fins
4
Q
Epidermal cells build up internal what deposits
A
keratin
5
Q
what are advantages to endothermic metabolism
A
powers energetically expensive flight, these animals are generally more active
6
Q
defining traits of a mammal
A
mammary glands and fur
7
Q
Monotremes
A
- lay eggs
- babies suck milk from mother
8
Q
Marsupials
A
- placentas
- very short gestation: complete embryonic development in pouch
9
Q
Eutherians
A
- complex placentas
- longer gestation: complete embryonic development in uterus
