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American Public University SCIN 401 Mammalogy Quiz Ch

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American Public University

SCIN 401

Mammalogy

Quiz Ch. 1

Question1)Why have 400 new mammal species been discovered since 1993?

 

 

A.            discovery of new species in remote areas

B.            taxonomic revisions

C.            genetic analysis

 

D.            all of the above

 

 

Question 2

A molecular clock can be used to estimate the time two species have diverged evolutionarily. The clock is based on differences between the species in:

 

 

A.            the number of shared-derived characters

 

B.            the number of silent genetic substitutions

C.            the number of morphological sympleiomorphies

D.            the number of anatomical synapomorphies

 

 

Question 3

Homologous characteristics differ from analogous characteristics because

 

 

A. homologous characteristics have a shared ancestry and analogous characteristics do not

    B. analogous characteristics have a shared ancestry and homologous characteristics do not

 

C. analogous characteristics can be used to group species together in a cladogram and homologous characteristics can not

 

D. none of the above

 

 

Question 4

Which of the following is not a diagnostic characteristic of mammals?

 

 

A.            hair

B.            mammary glands

C.            endothermy

 

D.            small brain size

 

 

Question 5

The teeth of most mammal species

 

 

A.            have generalized bibospheic molars.

B.            are primarily lophodont.

 

C.            can be used to understand that species' specific ecology.

D.            have the same dental formula.

 

 

Question 6

During the Meozoic era, the first mammals were likely

 

 

A.            large and competed for food sources with dinosaurs.

 

B.            small and nocturnal.

C.            large and aquatic.

D.            small and diurnal.

 

Question 7

Metatherian mammals contain these representative species:

 

 

A.            dugongs and sea cows.

 

B.            opossums, wombats, and kangaroos.

C.            solenodons, gymnures, and alamiquis.

D.            kangaroo rats, voles, and pacas.

 

 

Question 8

Monotremes include the following taxa

 

 

A.            gibbons.

B.            hyraxes.

C.            feathertail gliders and feathertail possums.

 

D.            playpuses, echidnas, and spiny anteaters.

 

 

Question 9

Platypus karyoptypes (chromosome sets) contain

 

 

A.            no X or Y chromosomes.

B.            1 X and 1 Y chromosome.

 

C.            5 X and 5 Y chromosomes.

D.            10 X and 5 Y chromosomes.

 

 

Question 10

 

You discover a new species and bring it back to the lab to document and describe. Lab results show an eye structure with a high proportion of rods and an ear structure with a very long external auditory meatus. You can conclude with relative confidence that the species likely belongs in the Order:

 

 

A.            Carnivora

B.            Pilosa

C.            Lagomorpha

D.            Tublindentata

 

E.            Cetacea

 

 

Question 11

In early reptiles, which lower jaw bone became a bone in the middle ear of mammals?

 

 

A.            Dentary

B.            Occipital

C.            Parietal

 

D.            Quadrate

E.            Stapes

 

 

Question 12

Which of the following is a primitive reproductive trait of Monotremes?

 

 

A.            The presence of an egg tooth.

B.            Oviparity.

C.            Lactation from lobules or abdominal fur.

 

D.            All of the above.

E.            None of the above.

 

 

Question 13

Extant metatherians occur in

 

 

A.            Neotropics.

B.            South America.

C.            Australia.

D.            Tasmania.

 

E.            All of the above

 

 

Question 14

Which of the following statements is the most correct?

 

 

A.            Although there are many convergent ecological equivalents between eutherians and metatherians, there are no flying or marine metatherians.

B.            Although restricted to Australian region and the Neotropics, metatherians are the most diverse and species rich group of mammals.

C.            Metatherians, as a convergent group with eutherians, demonstrate equal levels of social behavior including dominance hierarchies, cooperation in young rearing, and territoriality.

D.            The extended gestation of eutherians produces young that are more ecothermic than metatherians.

E.            Karyotypes have shown that metatherians have an equal number of chromosomes to eutherians.

 

 

Question 15

The function of the marsupium is

 

 

A.            to provide a location for altricial young to attach to a nipple and grow.

B.            to provide an alternative to the bifid female reproductive tract for fertilization.

C.            to provide a form of male parental care.

 

D.            to provide resources for precocial young to undergo organogenesis.

E.            to provide a hatching place for the leathery egg of metatherians.

 

 

Question 16

Old World jerboas and New World kangaroo rats have similar morphological traits that are due to convergent evolution. The appropriate term for these morphological traits is:

 

 

A.            symplesiomorphic

 

B.            analogous

C.            cladistic

D.            apomorphic

E.            homologous

 

 

Question 17

Which of the following is not a diagnostic character of Mammalia?

 

 

A.            Accessory jaw bones shifted away from the dentary-squamosal joint in adults which become associated with cranium alone

 

B.            ecothermy

C.            mammary glands

D.            brain with divided optic nerves

E.            cerebellum folded

 

 

Question 18

The changes of bones in the jaw region to become the ear part of the ear apparatus during the development of marsupials such as Monodelphis sp., demonstrates

 

A.            how ontogenic shifts remain constant across species.

B.            how phylogeny recapitulates ontogeny.

 

C.            how ontogeny recapitulated phylogeny.

D.            how metatherians are advanced mammals.

 

 

Question 19

Monotremes are

 

A.            ovoviviparous.

B.            metatherian.

C.            eutherian.

D.            viviparous.

 

E.            oviparous.

 

 

Question 20

Members of the Family Peramelidae (bandicoots) have what type of specialized foot morphology?

 

 

A.            The hindfoot has completely lost the ability to move in multiple planes.

B.            The hindfoot is functionally monodactyl increasing cursorial ability.

 

C.            The second and third digits in the hindfoot are joined by an interdigital membrane allowing the digits to act together.

D.            None of the digits in the hindfoot are reduced.