mammals Flashcards

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1
Q

hearts

A

4 chambered

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2
Q

Arose from early reptile

A

triassic era

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3
Q

Only one jaw bone

A

therapsids
220 million years ago

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4
Q

optic lobes

A

2-4

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5
Q

Absence of ______ in red blood cells

A

nuclei

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6
Q

of cervical vertebrae

A

7

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7
Q

bones in ear

A

3

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8
Q

chordate

A

anything with spinal cords

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9
Q

Monotremata

A

egg laying

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10
Q

prototheria

A

monotremata
-echidna
-platypus

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11
Q

metatheria

A

marsupialia
-pouched
-born immature
-complete development in mom’s pouch

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12
Q

Marsupial development:

A

-fertilized egg surrounded by shell membrane, but NO SHELL
-later development; short lived placenta

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13
Q

Kangaroo niche

A

grazers
middle of triangle

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14
Q

Eutheria

A

true placental

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15
Q

eutheria

A

largest and most successful class
young remain in uterus

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16
Q

Mammals location

A

everywhere but antarctica

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17
Q

rodentia

A

-herbivores with chisel incisors
-SINGLE pair of incisors
-largest order of placentals (1814sp)

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18
Q

rodents:

A

squirrels, rats, mice, beaver, porcupine

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19
Q

eutheria

A

whales, elephants, dog, shrew, armadillo… etc

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20
Q

marsupialia

A

opposums, kangaroo, koala

21
Q

prototheria

A

echidna, platypus

22
Q

chiroptera

A

flying mammals
sonar
FOUR long fingers

23
Q

insectivora

A

insect eating
fossorial (live underground)

24
Q

carnivora

A

teeth adapted for seizing prey and tearing flesh
none native to australia
learn to hunt

25
Q

cats

A

felidae

26
Q

canidae

A

dogs

27
Q

bears

A

ursidae

28
Q

racoons

A

procyonidae

29
Q

weasel

A

mustellidae

30
Q

hyena

A

hyecinidae

31
Q

fox that climbs trees

A

grey fox

32
Q

plantigrade

A

flat foot walkin

33
Q

Koala habitat

A

schleripherous forest

34
Q

bear lips

A

prehensile lips

35
Q

bat that fishes

A

bulldog bat

36
Q

chordate mammal

A

tunicate
sea squid

37
Q

primates

A

-binocular vision
-well developed cerebrum
-arms that rotate around their shoulder joints

38
Q

primate evolution

A

2 groups:
prosimians
anthropoids

39
Q

braceation

A

monkey swing through trees

40
Q

artiodactyla

A

even toed ungulates
-deer, sheep, giraffe

41
Q

perissodactyla

A

odd toed ungulates
horse, rhino, elephant

42
Q

cetacea

A

tail- fluke
baleen whales- keratin plates

43
Q

pinnipedia

A

seals, walruses
pinni= small ear

44
Q

sirenia

A

manatees and dugongs

45
Q

lagomorpha

A

gnawing animals
hind legs larger
among fastest mammals

46
Q

lagomorpha teeth vs. rodentia

A

four to two incisors
2 to 1 pair

47
Q

edentata

A

insect eaters
mostly toothless: peglike teeth
armadillo

48
Q

proboscidea

A

trunked mammals
trunk= upper incisors
18hr/day feeding