Lecture

Question 1

Max dentition for placental mammals

Answer 1

3143/3143

Question 2

Max dentition for marsupials

Answer 2

5134/4134

Question 3

Characteristics of Monotremes

Answer 3

Lays eggs, fur, have cloaca as only orifice

Question 4

Characteristics of Marsupials

Answer 4

2 vaginas, lays eggs, also has a placenta

Question 5

What is a lazarus taxon

Answer 5

species lost in the fossil record and rediscovered

Question 6

Heterodonty

Answer 6

Having different morphology in teeth- cetaceans are exception in mammals

Question 7

Diphyodonty

Answer 7

having 2 sets of teeth milk teeth and adult teeth

Question 8

Skull age: Juvenile

Answer 8

Has at least one milk/deciduous tooth

Question 9

Skull age: Sub-adult

Answer 9

Post cranium has not completely fused together

Question 10

Skull age: Adult

Answer 10

Bones have fused completely, no deciduous teeth left

Question 11

What clade did all mammals come from?

Answer 11

Synapsids; group has single hole into cranium

Question 12

What is the common accepted theory of how humans entered the Americas?

Answer 12

During the ice age with lowered ocean levels, the bering land strip was created and they traveled across there to radiate over the continent

Question 13

What are the three muscles of mastication

Answer 13

Temporalis, Lateral and Medial pterygoid

Question 14

What is the Atlas

Answer 14

Neck vertebrae

Question 15

Where do the ribs attach

Answer 15

thoracic vertebrae

Question 16

What is the lower back

Answer 16

lumbar vertebrae

Question 17

What bone type makes up the tail

Answer 17

caudal vertebrae

Question 18

Where does the humerus connect?

Answer 18

Pectoral girdle

Question 19

Where does the femur connect?

Answer 19

Pelvic girdle

Question 20

What is the baculum and who has it

Answer 20

The penis bone; Primates, Rodents, Insectivores, Chiropterans, Carnivorans, Colugos

Question 21

What is determinate growth and what are the terms?

Answer 21

When long bones grow in sections until they fuse and can no longer grow at adulthood. Epiphysis=the ends of the long bone, Diaphysis=the long middle portion

Question 22

Plantigrade

Answer 22

Ankle or wrist is in contact with the ground

Question 23

Digitigrade

Answer 23

Podials off the ground, weight of movement is on the distal phalanges

Question 24

Unguligrade

Answer 24

Ends of distal phalanges on the ground, (ie hooves)

Question 25

Ambulatory locomotion

Answer 25

Walking along the ground on 4 limbs, plantigrade

Question 26

How do cats extend their claws

Answer 26

By contracting the flexor muscle which in turn stretches the retractor ligament

Question 27

Sprinters

Answer 27

A cursor(runner) built for bursts of speed

Question 28

Stayers

Answer 28

A cursor(runner) built for sustained running over long distance

Question 29

Paraxony

Answer 29

Axis of weight passes between digits 3 and 4

Question 30

Mesaxony

Answer 30

Axis of weight passes through digit 3

Question 31

How does the pronghorn spring

Answer 31

When standing a ligament in the ankle is stretched, creating potential energy

Question 32

Graviportal

Answer 32

Large bodied mammals with limbs stacked under the body and splayed digits, columnar limbs

Question 33

Scansoriality

Answer 33

Small bodied climbing mammals with sharp claws/grasping digits/opposible thumbs/prehensile tail

Question 34

Arboreality

Answer 34

Live and move through trees, similar to scansorials but also often have ball and socket joints to rotate themselves around trees

Question 35

Ricochetal saltators

Answer 35

Jumping mammals, often in open locations, shortened forelimbs, enlongated pes, and long tails