vertebrates - mammals Flashcards
1
Q
mammals
A
6400 species
2/3 of mammals are rodents or bats
2
Q
mammal traits
A
mammary glands
hair/fur
3
Q
mammary glands
A
smaller young
not dependent on szns
not dependent on males
4
Q
hair/fur
A
insulation
sensing whiskers
5
Q
lineages
A
monotremes
marsupials
placentals/eutherians
6
Q
monotremes
A
egg laying
australia, new guinea
toothless adults
babies suck milk from fur
7
Q
marsupials
A
marsupium - pouch
short gestation
8
Q
marsupials and eutherians
A
nipples
live young
higher metabolic rates
embryonic development in uterus
placenta
9
Q
convergence
A
marsupials developed in isolation in australia
eutherian migration allowed for oppossum families in the americas
10
Q
eutherians
A
more complex placenta, longer pregnancies
complete development in the uterus
air, land, and sea
