Deck 20: Mammals

Question 1

A characteristic of mammals is

A)ectothermy.
B)homodont teeth.
C)a highly developed neocerebrum.
D)a three-chambered heart.

Answer 1

C

Question 2

Herbivorous mammals may be classified into two groups: the browsers and grazers,and the gnawers.

Answer 2

True

Question 3

The fur of mammals

A)consists of underhair and guard hair.
B)is shed periodically by most mammals.
C)is composed of keratin.
D)all of these

Answer 3

D

Question 4

True horns are

A)the same as antlers.
B)restricted to males.
C)not normally shed.
D)usually brancheD.

Question 5

Some northern-dwelling mammals molt to blend in with the changing color of the environment.

Question 6

Mammals appeared in the Mesozoic,but did not begin their extensive radiation until the Cenozoic.

Question 7

The therapsids were the first mammals.

Question 8

Carnivorous animals have a longer digestive tract,and a small cecum.

Question 9

Two characteristics that are unique to mammals are hair and mammary glands.

Question 10

The structures that are not derivatives of the mammalian integument are

A)hair.
B)sweat glands.
C)prostate glands.
D)mammary glands.

Question 11

In contrast to birds,very few mammals make regular seasonal migrations.

Question 12

All members of order Carnivora are carnivorous in diet.

Question 13

Mammals belong to the

A)anapsid lineage of amniotes.
B)synapsid lineage of amniotes.
C)diapsid lineage of amniotes.

Question 14

The glands that produce an oily substance and are typically associated with hair follicles are the

A)apocrine.
B)eccrine glands.
C)sebaceous glands.
D)scent glands.

Question 15

The barren-ground caribou undergo annual migrations from winter ranges on the tundra to summer ranges in the boreal forest.

Question 16

The prosimians and the simians are the two major lineages of the primates.

Question 17

The only therapsid group which survived to enter the Mesozoic was the

A)cynodonts.
B)pelycosaurs.
C)sphenacodontines.
D)theropods.

Question 18

The first simian fossils appeared about 100 million years ago.
Multiple Choice Questions

Question 19

The largest group of mammals is the

A)EutheriA.
B)Ornithodelphia.
C)Metatheria.
D)Primates.

Question 20

The skin of mammals,as in all vertebrates,is made up of dermis and epidermis.

Question 21

The North American mammal that shows 10-year cycles in population density,and that is preyed upon by lynx and other predators,is the _________.

Question 22

_____________ are hunted and killed for their horn,which is believed erroneously to be an aphrodisiac.

Question 23

In some nonruminant herbivores,such as rabbits and horses,the fermentation chamber for cellulose breakdown is a large diverticulum of the gut called the _____________.

Question 24

The second palate of mammals is important as it facilitated

A)efficiency in locomotion.
B)faster digestion.
C)efficient nursing.
D)endothermy.

Question 25

Hair is produced by the layer of skin called _______________.

Question 26

The scientific name of the first true human is ______________.

Question 27

The number of orders in class Mammalia is

A)6.
B)15.
C)29.
D)50.

Question 28

Of the two kinds of mammals' sweat glands,the one that produces a watery sweat is called ________.

Question 29

The four kinds of teeth that are generally recognized in mammals are molars,premolars,canines,and ___________.

Question 30

During the annual growth,antlers develop beneath a cover of highly vascular skin called ________________.

Question 31

In mammals the muscular structure which separates the thoracic and abdominal cavities is the ___________________.

Question 32

Scent glands are used by mammals for

A)territorial marking.
B)defense.
C)warning.
D)all of these
Fill in the Blank Questions

Question 33

The mammal that makes one of the longest migration to breeding areas in the Pribilof Islands is the

A)barren-ground caribou.
B)fur seal.
C)humpback whale.
D)sperm whale.

Question 34

Typically,mammals have two sets of teeth,a kind of dentition called _____________.

Question 35

In mammals,estrus is the time when the animals are

A)in heat and mating.
B)pregnant.
C)menstruating.
D)giving birth to young.

Question 36

An example of a monotreme is the

A)bat.
B)porpoise.
C)opossum.
D)none of the above

Question 37

The Neanderthals belong to the genus ________________.

Question 38

The four-chambered stomach of ruminants consists of a

A)rumen,cecum,omasum,and colon.
B)rumen,reticulum,cecum,and colon.
C)rumen,cecum,omasum,and metomasum.
D)rumen,reticulum,omasum,and abomasum.

Question 39

The calls of echolocation bats are "frequency modulated," meaning that

A)each pulse repeatedly rises and falls in frequency.
B)the rate of pulse production declines as the bat nears the object.
C)the frequency of the pulse is high at the beginning and drops toward the end.
D)the transmission-to-reception time increases as the bat nears an object.

Question 40

Mammals typically have external ears,known as _______________.

Question 41

The ancestral primate stock split into two major lineages,one of which gave rise to _______________,which include lemurs,tarsiers,and lorises.

Question 42

Homo sapiens owes much of its cultural and intellectual achievements to our ancient tree-living or _____________ ancestry.

Question 43

The _____________ is a rodent that exhibits periodic great increases in their population,followed by significant declines.

Question 44

Pouched,viviparous mammals are called ______________.

Question 45

The only flying (not gliding)mammals are the ___________.

Question 46

Delayed ____________ in many mammals is a mechanism by which gestation is postponed after mating.

Question 47

Since the discovery of Lucy,new finds of even older hominid fossils have extended our knowledge of human ancestry.For example,in 2001,the sands of Chad yielded skeletal remains of the most ancient hominid yet discovered,_____________________.

Question 48

If you were to examine one physical characteristic of a mammal to learn about its life style,you would look first at its ____________.