Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Ecology of Mammals > Ch. 10 - Monotremes & Marsupials > Flashcards

Ch. 10 - Monotremes & Marsupials Flashcards

1
Q

This is another word for taxonomy

A

Systematics

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What are mammalian sub- and infraclasses based on?

A

Reproductive strategies

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

About how many mammal species are there?

A

4000

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What is the only class less diverse than mammals?

A

Amphibians

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

To what kingdom do mammals belong?

A

Animalia

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

To what phylum do mammals belong?

A

Chordata

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

To what subphylum do mammals belong?

A

Vertebrata

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

To what class do mammals belong?

A

Mammalia

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

This subclass of Mammalia is oviparous

A

Prototheria

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

This subclass of Mammalia is viviparous

A

Theria

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

This infraclass of Theria includes marsupials

A

Metatheria

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

This infraclass of Theria includes placental mammals that aren’t marsupials

A

Eutheria

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

To what subclass and order do the monotremes belong?

A

Subclass Prototheria and Order Monotremata

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What are three physical characteristics of platypus eggs?

A

Small, leathery, permeable

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Do monotremes have mammary glands?

A

Yes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Do monotremes have nipples?

A

No

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

What do monotremes have in place of nipples?

A

Lobules on belly

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

Do monotreme adults have teeth?

A

No

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

What are three common components of platypus diets?

A

Invertebrates, fish, amphibians

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

Are platypus strictly aquatic?

A

No (semiaquatic)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

In the platypus, this is soft and highly ennervated

A

Electroreceptive bill

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

In the platypus, this is limited underwater

A

Eyesight

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

What do platypus males have on their hind foot?

A

Venomous spur

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

What is the purpose of the venomous spur in platypus?

A

Unknown

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

Platypus share this feature with reptiles - a single opening for reproductive, urinary, and fecal tracts

A

Cloaca

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

About how many genes are in the platypus genome?

A

18,500

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
27
Q

What percentage of genes do platypus share with other mammals?

A

82%

28
Q

With what group do platypus share 18% of their genes?

A

Reptiles

29
Q

What are three characteristics that platypus share with reptiles?

A

Egg-laying, vision, venom

30
Q

Where are platypus found?

A

Eastern Australia and Tasmania

31
Q

Where are echidnas found?

A

Australia, Tasmania, New Guinea

32
Q

Are echidnas strictly terrestrial?

A

Yes

33
Q

Where do echidnas keep their eggs?

A

In pouch

34
Q

Where are echidna lobules found?

A

In pouch

35
Q

What are echidnas’ two main food sources?

A

Earthworms and ants

36
Q

Echidnas have this highly ennervated feature

A

Beak

37
Q

What are two characteristics of echidnas’ tongues?

A

Long and extensible

38
Q

How many orders of marsupials are there?

A

7

39
Q

How many species of marsupials are there?

A

63

40
Q

How many orders of marsupials are there in North and South America?

A

1

41
Q

How many species of marsupials are there in North America?

A

1

42
Q

How many species of marsupials are there in South America?

A

2

43
Q

In marsupials, this is the female abdominal pouch

A

Marsupium

44
Q

Do marsupials have low prenatal investment?

A

Yes

45
Q

How long is a typical marsupial gestation?

A

2 weeks

46
Q

Do marsupials have a long lactation period?

A

Yes

47
Q

About what percentage of their mothers’ weight are marsupial offspring?

A

<1%

48
Q

What is the marsupial brain size compared to their body?

A

Small

49
Q

Do marsupials have poor dentition diversity?

A

Yes

50
Q

What two characteristics do marsupials like possums have for grasping?

A

Opposable thumbs and prehensile tails

51
Q

About when did the Tasmanian wolf go extinct?

A

1900

52
Q

Marsupials employ this reproductive strategy, a form of delayed implantation of an embryo until appropriate forage and environmental factors are ideal

A

Embryonic diapause

53
Q

What hormones are responsible for embryonic diapause?

A

Estrogens

54
Q

How many days do marsupials gestate in embryonic diapause?

A

33 days

55
Q

In embryonic diapause, how many days do joeys stay in the pouch?

A

235

56
Q

In embryonic diapause, the implantation of the third embryo is delayed until this happens

A

A joey leaves the pouch

57
Q

Which has a longer gestation, methatherians or eutherians?

A

Eutherians

58
Q

Which has a longer lactation, metatherians or eutherians?

A

Metatherians

59
Q

Which has a higher investment in natal development, metatherians or eutherians?

A

Eutherians

60
Q

Which has higher brain development/volume, metatherians or eutherians?

A

Eutheria

61
Q

Are metatherians typically solitary and territorial?

A

No

62
Q

Are eutherians typically more cooperative, social, and territorial?

A

Yes

63
Q

Do metatherians have highly developed anti-predatory behavior?

A

No

64
Q

Do metatherians have high evolutionary flexibility?

A

No

65
Q

Do eutherians have high adaptive radiation?

A

Yes

Ecology of Mammals (21 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions