Midterm 2 random Flashcards Preview

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Flashcards in Midterm 2 random Deck (19)
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1
Q

morphological features associated with myrecophagus

A
long snout
long sticky tongue
strong claws
simple digestion
-ketatinized stomach
reduced/absent teeth
sm. pinnae/nostiles
2
Q

characteristics of xenarthra

A

lack incisors and canines
cheek teeth single rooted if present
xenarthrous vert adds rigidity and extra articulation

extreme specialists
very low Tb and BMR

3
Q

two families in Folivora

what order?

A

Megalonichidae
Bradypodidae

Pilosa

4
Q

how do sloths cope with eating leaves?

A

microbial symbionts in compartmented stomach
very low MBR
only deficate 1/2 times a week to save energy
move very slow, insulate well and have a lot Tb

5
Q

Megalonychidae
vs
Bradypodidae

A
2-toed
bigger
more active
longer gestation
6-8 caudal vert
3-toes
smaller
slower
shorter gestation
8-9 caudal vert
-flexible neck
green fur
6
Q

myrmecophagidae

suborder?

A

vermilingua

edentate
powerful front legs
single, greatly enlarged front legs
rosta elongated 
tongue long and sticky
pyloric region of stomach thickened
-gizzard
7
Q

dasypodidae

order?

A

cingulate

armour-like carapace on head, back + sides
non-overlapping, keratinized epidermal scales
connected with flexible skin
vert. modified to attach to carapace
reduced teeth

8
Q

what is the smallest eutherian order?

what is it most closely related to?

A

Tubulidentata

Macroscelidea

9
Q

tubulidentata

superorder?

A
afrotheria
-hexagonal dentine prisms
-homodont
ants and termites
solitary and nocturnal
10
Q

pholidota

where did they used to be classified?

A

Xenarthrans in Edentate

-bodies covered in overlapping scales
-keratinized hairs
-no teeth, long sticky tongues
-sticky viscous saliva on tongues
ants = 96% of diet
-muscular gizzard like region

11
Q

what has caused pangolins to become so endangered? (4)

A

luxury meat
chinese medicine
scales for good luck
habitat destruction

12
Q

what order has a chorioallantoic placenta

A

Peramelemorphia

13
Q

how can you tell what a bat eats?

A

uropatagium = insects

no uro. = fruits

14
Q

what are three adaptations in bats?

A
  1. patagium/uropatagium
  2. hind limbs to hang
  3. suction cup hands in tropical habitats
15
Q

Odobenidae

A

walrus
well developed cervical and thoracic vert
fore and hind limbs support body to walk

16
Q

Otariidae

A

seal lions/furred seals
well developed cervical and thoracic vert
fore and hind limbs support body to walk

17
Q

phocidae

A

earless/true seals
well developed lumbar vert
clumsy on land

18
Q

what adaptations do elephants have to dissipating heat?

A

wrinkled skin = holds h20
ears highly vascularized
sparse body hair
behavioural - mud baths, ear flailing, shade

19
Q

how to elephants communicate?

A

seismic communication

  1. somatosensory
    - thick pad of fat on feet conducts vibration detected by mechanoreceptors in
  2. bone conduction
    - vibration travels up toenails to bone in middle ear. enlarged malls. can close middle ear canal