Lecture 20

Question 2

the study of mammals?

Answer 2

Mammalogy

Question 3

Half of the mammal diversity is represented by what?

Answer 3

rodents

Question 4

Rodentia

Answer 4

most ancestral group of mammals

Question 5

the largest group of mammals?

Answer 5

Chiroptera (bats)

Question 6

What are the 3 mammalian subclasses?

Answer 6

1-Monotremes (lack of nipples, oviparous, and only group of mammals, skin secretes milk)
2- Marsupials ( have nipples, very short, gestation period, development completed in mother punch)
3-Eutherian Mammals( placenta)

Question 7

Mammal laundry list:

Answer 7

-Hair/fur: pelage
-Reversals w/ scales Ex:armadillos
-glandular skin: sweat, scent, sebaceous & mammary glands)
-middle ear bone (incus, malleus,stapes,)
-alveolar lungs (expands surface area)
-fleshy external ears (help filter sound into on canal)
-4 chamber heart & endothermic
-milk from mammary glands
-synapsids-one temporal fenestra

Question 8

Monotreme characteristics

Answer 8

-most primitive extant mammals
-oviparous
-through modified sweat glands
-waste/reproduction openings cure a single duct (Cloaca) no urinary bladder, no placenta
-lack teeth as adults (Raspy pads)in the mouth has certain and process