Lecture 34 - Vertebrates II (Mammals) Flashcards
1
Q
4 Derived Characteristics of Mammals
A
- Differentiated teeth
- Hair
- Mammary glands
- Proportionately large brain
2
Q
What are the 3 living lineages of mammals?
A
- Marsupials
- Monotremes
- Eutherians
3
Q
Marsupials definition (EX:)
A
- embryo develops within placenta of mother’s uterus
- completed development in mother’s pouch (EX: kangaroo)
4
Q
Monotremes definition (EX)
A
-egg-laying mammals (EX: platypus)
5
Q
Eutherians definition (EX)
A
- most diverse mammalian group
- young complete development in uterus + born more developed
- EX: bats, carnivores, rodents etc.
6
Q
what are 3 basic eutherian characteristics?
A
- Known as placenta mammals
- Complete embryonic development in uterus, joined to mother more complex placenta with much more developed young at birth
- 65 million year ancestor rodent-like animal
7
Q
Chiroptera
A
bats
8
Q
Chiroptera (defining characteristic)
A
only mammals that have evolved true flight
9
Q
Chiroptera (nutrition)
A
diverse ecology: feed on insect, nectar, fruit etc.
10
Q
What caused Ebola?
A
“Bushmeat”
11
Q
Sirenia
A
manatees and dugongs
12
Q
Sirenia (defining characteristic)
A
Only herbivore marine animals
13
Q
Which species of Sirenia is extinct?
A
steller’s sea cow
14
Q
Sirenia (3 characteristics)
A
- 4 species
- live in tropic areas
- all threatened/endangered
15
Q
Cetacea
A
whales/dolphins