Mammals Flashcards
1
Q
Which of the following statements about hair is true? A) It is homologous to feathers. B) It is a dermal structure. C) It is found in all mammals. D) It is possessed by all endotherms.
A
C) It is found in all mammals.
2
Q
. The mammalian skull may be characterized as \_\_\_\_. A) anapsid B) diapsid C) biaspid D) synapsid
A
D) synapsid
3
Q
Which of the following evolved from a group of carnivorous pelycosaurs? A) therapsids B) labyrinthodonts C) anurans D) theropods
A
A) therapsids
4
Q
The earliest therians (mammals) evolved in the \_\_\_\_. A) Permian B) Triassic C) Cretaceous D) Cenozoic
A
B) Triassic
5
Q
The early therians most resembled a small \_\_\_\_. A) pig B) rat C) kangaroo D) horse
A
B) rat
6
Q
Unlike reptiles, the first mammals were characterized by ____.
A
two sets of teeth during the lifetime
7
Q
The implied presence of sebaceous and sweat glands in early mammals signified what? A) hair B) fossilized casts C) an epidermis D) a dermis
A
A) hair
8
Q
The adaptive radiation of the mammals occurred during the \_\_\_\_. A) Triassic B) Jurassic C) Cenozoic D) Cretaceous
A
D) Cretaceous
9
Q
What is one probable reason for the great radiation of mammals during the Cretaceous period?
A
demise of dinosaurs and many other reptiles
10
Q
Mammals are characterized by the presence of \_\_\_\_ occipital condyles. A) one B) two C) three D) four
A
B) two
11
Q
The \_\_\_\_ is located between the thoracic and abdominal cavities in mammals. A) liver B) mediastinum C) diaphragm D) omasum
A
C) diaphragm
12
Q
Like reptiles and birds, mammals have \_\_\_\_ kidneys. A) mesonephric B) aglomerular C) metanephric D) unpaired
A
C) metanephric
13
Q
Hair, horns, and nails are composed of \_\_\_\_. A) carotenes B) keratin C) cerumen D) colostrum
A
B) keratin
14
Q
The function of vibrissae is for \_\_\_\_. A) coloration B) insulation C) protection against wear D) sensation
A
D) sensation
15
Q
Rhinoceros horn is considered by some cultures to be an aphrodisiac. Given what you know about the composition of its horn, consuming this horn might be compared to ____.
A
biting your fingernails
16
Q
In most mammals, eccrine glands occur typically on \_\_\_\_. A) all areas of the body B) the head only C) areas of the body with much hair D) hairless areas of the body
A
D) hairless areas of the body
17
Q
In humans, one might expect to find apocrine glands ____.
A) in the armpits
B) on the face
C) on the palms and the bottom of the foot
D) all over the body
A
A) in the armpits
18
Q
In humans, sebaceous glands are most numerous on the scalp and the \_\_\_\_. A) palms B) back C) face D) armpits
A
C) face
19
Q
Mammals have teeth that are differentiated into a variety of tooth types. This condition is known as ____.
A
Heterodont
20
Q
Members of order \_\_\_\_ have ever-growing incisors and cheek teeth. A) Pinnipedia B) Cetacea C) Insectivora D) Rodentia
A
D) Rodentia
21
Q
An example of an insectivore is a \_\_\_\_\_. A) bat B) cat C) ruminant D) dolphin
A
A) bat
22
Q
Which of the following is not a ruminant? A) horse B) cow C) bison D) goat
A
A) horse
23
Q
Most female mammals are sexually receptive only during \_\_\_\_. A) diapause B) estrus C) gestation D) parturition
A
B) estrus
24
Q
Unlike birds and reptiles, mammals possess three bones (ossicles) in the middle ear. True or False
A
True
25
Mammals are characterized by having diphycercal teeth. True or False
False
26
Mammalian red blood cells may be characterized as nucleated biconcave corpuscles. True or False
False
27
True horns, which are found in ruminants, are composed of keratin surrounding a bony core, and are shed annually. True or False
False (True horns are not shed)
28
Sebaceous glands function primarily in temperature regulation. True or False
False
29
An animal that eats just about anything (like most humans) is known as an ________.
omnivore
30
The milk or deciduous teeth are replaced by permanent teeth. True or False
True
31
________ have a four-chambered stomach to aid in digestion of cellulose.
Ruminants
32
The correct order of the four chambers of a ruminant is ____, _____, _____, and _____
Rumen, Reticulum, Omasum, and Abomasum
33
Some herbivores like rabbits eat their feces to aid in complete digestion. True or False
True
34
Herbivores tend to be more active and intelligent than carnivores.True or False
False
35
Members of order primates include humans, as well as monkeys and apes. This order is derived from tree-dwelling insectivores, so you are more closely related to a shrew than a cat! True or False
True
36
The predecessor of Homo sapiens was Homo erectus. Our species appeared about 30,000 years ago. True or False
True
37
Members of infraclass _________ include the duck-billed platypus, spiny anteater.
Ornithodelphia
38
The ________ may be distinguished from the rodents, as they have a second set of small incisors behind the first, although members of both groups do have ever-growing incisors.
lagomorphs
39
The prime distinguishing characteristic of the artiodactyls and perissodactyls is the number of toes; artiodactyls have an even number of toes, and perissodactyls have an odd number of toes. Of the two, the artiodactyls are more speciose. True or False
True
40
The ancestral primates diverged into two major lineages, the ____ and the ___.
prosimians, simians
41
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Which of the following is not in one of the three major simian clades?
A) tarsiers
B) howler monkeys
C) mandrills
D) gorillas
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A) tarsiers
42
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Which of the following is unique to Homo sapiens and found in no other species?
A) binocular vision
B) nongenetic cultural evolution
C) grasping hands
D) abilitiy to use tools
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B) nongenetic cultural evolution
