Lecture 29 Flashcards
1
Q
How many bones do reptile and mammal ears have
A
reptile: 1
mammal: 3
2
Q
What are mammary glands
A
glands that secrete nutritious fluid (milk) to feed offspring.
3
Q
Mammalian characteristics
A
-endothermic
-Dentition much more differentiated
-teeth occlude more closely than reptiles
-have hair
-have diaphragm
4
Q
3 major clades of extant mammals
A
- Monotremata
- Marsupialia
- Eutheria
5
Q
What are monotremes
A
-5 extant species (1 platypys, 4 echidnas )
-lack teeth
-feed on invertebrates
6
Q
What are marsupials
A
-many carry a pouch (kangaroo)
-young born as partially developed embryo
7
Q
What are Eutheria
A
-non-marsupial mammals
-nourish young via placenta
-have separate urinary & anal openings
