Ch. 10 - Monotremes & Marsupials

Question 1

This is another word for taxonomy

Answer 1

Systematics

Question 2

What are mammalian sub- and infraclasses based on?

Answer 2

Reproductive strategies

Question 3

About how many mammal species are there?

Answer 3

4000

Question 4

What is the only class less diverse than mammals?

Answer 4

Amphibians

Question 5

To what kingdom do mammals belong?

Answer 5

Animalia

Question 6

To what phylum do mammals belong?

Answer 6

Chordata

Question 7

To what subphylum do mammals belong?

Answer 7

Vertebrata

Question 8

To what class do mammals belong?

Answer 8

Mammalia

Question 9

This subclass of Mammalia is oviparous

Answer 9

Prototheria

Question 10

This subclass of Mammalia is viviparous

Answer 10

Theria

Question 11

This infraclass of Theria includes marsupials

Answer 11

Metatheria

Question 12

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

Answer 12

Eutheria

Question 13

To what subclass and order do the monotremes belong?

Answer 13

Subclass Prototheria and Order Monotremata

Question 14

What are three physical characteristics of platypus eggs?

Answer 14

Small, leathery, permeable

Question 15

Do monotremes have mammary glands?

Answer 15

Yes

Question 16

Do monotremes have nipples?

Answer 16

No

Question 17

What do monotremes have in place of nipples?

Answer 17

Lobules on belly

Question 18

Do monotreme adults have teeth?

Answer 18

No

Question 19

What are three common components of platypus diets?

Answer 19

Invertebrates, fish, amphibians

Question 20

Are platypus strictly aquatic?

Answer 20

No (semiaquatic)

Question 21

In the platypus, this is soft and highly ennervated

Answer 21

Electroreceptive bill

Question 22

In the platypus, this is limited underwater

Answer 22

Eyesight

Question 23

What do platypus males have on their hind foot?

Answer 23

Venomous spur

Question 24

What is the purpose of the venomous spur in platypus?

Answer 24

Unknown

Question 25

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

Answer 25

Cloaca

Question 26

About how many genes are in the platypus genome?

Answer 26

18,500

Question 27

What percentage of genes do platypus share with other mammals?

Answer 27

82%

Question 28

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

Answer 28

Reptiles

Question 29

What are three characteristics that platypus share with reptiles?

Answer 29

Egg-laying, vision, venom

Question 30

Where are platypus found?

Answer 30

Eastern Australia and Tasmania

Question 31

Where are echidnas found?

Answer 31

Australia, Tasmania, New Guinea

Question 32

Are echidnas strictly terrestrial?

Answer 32

Yes

Question 33

Where do echidnas keep their eggs?

Answer 33

In pouch

Question 34

Where are echidna lobules found?

Answer 34

In pouch

Question 35

What are echidnas' two main food sources?

Answer 35

Earthworms and ants

Question 36

Echidnas have this highly ennervated feature

Answer 36

Beak

Question 37

What are two characteristics of echidnas' tongues?

Answer 37

Long and extensible

Question 38

How many orders of marsupials are there?

Answer 38

7

Question 39

How many species of marsupials are there?

Answer 39

63

Question 40

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

Answer 40

1

Question 41

How many species of marsupials are there in North America?

Answer 41

1

Question 42

How many species of marsupials are there in South America?

Answer 42

2

Question 43

In marsupials, this is the female abdominal pouch

Answer 43

Marsupium

Question 44

Do marsupials have low prenatal investment?

Answer 44

Yes

Question 45

How long is a typical marsupial gestation?

Answer 45

2 weeks

Question 46

Do marsupials have a long lactation period?

Answer 46

Yes

Question 47

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

Answer 47

<1%

Question 48

What is the marsupial brain size compared to their body?

Answer 48

Small

Question 49

Do marsupials have poor dentition diversity?

Answer 49

Yes

Question 50

What two characteristics do marsupials like possums have for grasping?

Answer 50

Opposable thumbs and prehensile tails

Question 51

About when did the Tasmanian wolf go extinct?

Answer 51

1900

Question 52

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

Answer 52

Embryonic diapause

Question 53

What hormones are responsible for embryonic diapause?

Answer 53

Estrogens

Question 54

How many days do marsupials gestate in embryonic diapause?

Answer 54

33 days

Question 55

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

Answer 55

235

Question 56

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

Answer 56

A joey leaves the pouch

Question 57

Which has a longer gestation, methatherians or eutherians?

Answer 57

Eutherians

Question 58

Which has a longer lactation, metatherians or eutherians?

Answer 58

Metatherians

Question 59

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

Answer 59

Eutherians

Question 60

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

Answer 60

Eutheria

Question 61

Are metatherians typically solitary and territorial?

Answer 61

No

Question 62

Are eutherians typically more cooperative, social, and territorial?

Answer 62

Yes

Question 63

Do metatherians have highly developed anti-predatory behavior?

Answer 63

No

Question 64

Do metatherians have high evolutionary flexibility?

Answer 64

No

Question 65

Do eutherians have high adaptive radiation?

Answer 65

Yes