Please answer all questions

1		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.
2		The mammalian skull may be characterized as
			A)	anapsid.
			B)	diapsid.
			C)	biaspid.
			D)	synapsid.
3		They evolved from a group of carnivorous pelycosaurs.
			A)	therapsids
			B)	labyrinthodonts
			C)	anurans
			D)	theropods
4		The earliest therians (mammals) evolved in the
			A)	Permian.
			B)	Triassic.
			C)	Cretaceous.
			D)	Cenozoic.
5		The early therians most resembled a small
			A)	pig.
			B)	rat.
			C)	kangaroo.
			D)	horse.
6		Unlike reptiles, the first mammals were characterized by
			A)	continuously replaced teeth.
			B)	only one set of teeth during the lifetime.
			C)	two sets of teeth during the lifetime.
			D)	continuously growing teeth.
7		The implied presence of sebaceous and sweat glands in early mammals signified what?
			A)	hair
			B)	fossilized casts
			C)	an epidermis
			D)	a dermis
8		The adaptive radiation of the mammals occurred during the
			A)	Triassic
			B)	Jurassic.
			C)	Cenozoic.
			D)	Cretaceous.
9		What is one probable reason for that adaptive radiation?
			A)	demise of dinosaurs and many other reptiles
			B)	presence of hair
			C)	novelty of the four-chambered heart
			D)	novelty of endothermy
10		Mammals are characterized by the presence of occipital condyles.
			A)	one
			B)	two
			C)	three
			D)	four
11		Between the thoracic and abdominal cavities in mammals is the
			A)	liver.
			B)	mediastinum.
			C)	diaphragm
			D)	omasum.
12		Like reptiles and birds, mammals have kidneys.
			A)	mesonephric
			B)	aglomerular
			C)	metanephric
			D)	unpaired
13		Hair, horns, and nails are composed of
			A)	carotenes.
			B)	keratin.
			C)	cerumen.
			D)	colostrum.
14		The function of vibrissae is for
			A)	coloration.
			B)	insulation.
			C)	protection against wear.
			D)	sensation.
15		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.
			B)	picking one's nose.
			C)	eating an egg.
			D)	eating the exoskeleton of a lobster.
16		In most mammals, eccrine sweat 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.
17		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.
18		In humans, sebaceous glands are most numerous on the scalp and the
			A)	palms.
			B)	back.
			C)	face.
			D)	armpits.
19		Mammals have teeth that are differentiated into a variety of tooth types. This condition is known as
			A)	diphyodont.
			B)	heterodont.
			C)	monodont.
			D)	homodont.
20		Many grazing mammals lack canines and/or upper incisors. This space is called a
			A)	fistula.
			B)	diastema.
			C)	canula.
			D)	carnassial space.
21		Members of order have ever-growing incisors and cheek teeth.
			A)	Pinnipedia
			B)	Cetacea
			C)	Insectivora
			D)	Rodentia
22		An example of an insectivore is a
			A)	bat.
			B)	cat.
			C)	ruminant.
			D)	dolphin.
23		Which of the following is not a ruminant?
			A)	horse
			B)	cow
			C)	bison
			D)	goat
24		Most female mammals are sexually receptive only during
			A)	diapause.
			B)	estrus.
			C)	gestation.
			D)	parturition.
25		Unlike birds and reptiles, mammals possess three bones (ossicles) in the middle ear.
			A)	True
			B)	False
26		Mammals are characterized by having diphycercal teeth.
			A)	True
			B)	False
27		Mammalian red blood cells may be characterized as nucleated biconcave corpuscles.
			A)	True
			B)	False
28		The structure in mammals for production of sound is the larynx.
			A)	True
			B)	False
29		True horns, which are found in ruminants, are composed of keratin surrounding a bony core, and are shed annually.
			A)	True
			B)	False
30		The two kinds of sweat glands found in mammals are apocrine glands and eccrine glands.
			A)	True
			B)	False
31		Sebaceous glands function primarily in temperature regulation.
			A)	True
			B)	False
32		An animal that eats just about anything (like most humans) is known as an omnivore.
			A)	True
			B)	False
33		The milk or deciduous teeth are replaced by permanent teeth.
			A)	True
			B)	False
34		Large canines, and ever-growing teeth characterize carnivores.
			A)	True
			B)	False
35		Ruminants have a four-chambered intestine to aid in digestion of cellulose.
			A)	True
			B)	False
36		The correct order of the four chambers of a ruminant is rumen, reticulum, abomasum, and omasum.
			A)	True
			B)	False
37		Some herbivores like rabbits eat their feces to aid in complete digestion.
			A)	True
			B)	False
38		Herbivores tend to be more active and intelligent than carnivores.
			A)	True
			B)	False
39		Small animals tend to have a relatively greater metabolic rate, based on their body weight, than a larger mammal.
			A)	True
			B)	False
40		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!
			A)	True
			B)	False
41		The predecessor of Homo sapiens was Homo erectus. Our species appeared about 30,000 years ago.
			A)	True
			B)	False
42		Members of infraclass Ornithodelphia include the duck-billed platypus, spiny anteater, and kangaroos.
			A)	True
			B)	False
43		The lagomorphs may be distinguished from the rodents, as lagomorphs have a second set of small incisors behind the first, although members of both groups do have ever-growing incisors.
			A)	True
			B)	False
44		Marine-dwelling mammals include members of orders carnivora, pinnipedia, sirenia, and cetacea.
			A)	True
			B)	False
45		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.
			A)	True
			B)	False