Question 1

Hair is produced by the layer of skin called the __________.

Accepted Answer

The answer of Hair is produced by the layer of...

Question 2

Place Paranthropus robustus,Ardipithecus ramidus,Sahelanthropus tchadensis,Australopithecus anamensis,Australopithecus africanus,
Australopithecus afarensis,Homo erectus,Homo habilis,and Homo sapiens in a general phylogeny.Where do the Neanderthals fit into this
scheme,and why?

Accepted Answer

The general phylogeny of these hominid s

Question 3

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

Accepted Answer

The answer of The four kinds of teeth that are...

Question 4

The so-called mammal-like reptiles of the early Mesozoic from which the modern mammals descended were the ____________.

Accepted Answer

The answer of The so-called mammal-like reptiles of the early...

Question 5

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

Accepted Answer

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

Question 6

A raccoon or bear that eats both plants and animals for food is

Accepted Answer

A)  multivorous. 
B)  ambivorous. 
C)  carnivorous. 
D)  omnivorous. 
E)  facultatively herbo-carnivorous. 
A)  multivorous. 
B)  ambivorous. 
C)  carnivorous. 
D)  omnivorous. 
E)  facultatively herbo-carnivorous.

Question 7

Discuss the recent fossil evidence on the origin of whales.What evidence suggests that they are the sister group to the hippopotamus?

Accepted Answer

Recent fossil evidence on the origin of

Question 8

The final chamber of the four-chambered ruminant stomach is a "true" stomach where normal digestion takes place,called the __________.

Accepted Answer

The answer of The final chamber of the four-chambered ruminant...

Question 9

Although there are exceptions,which of the following teeth are never deciduous in most mammals?

Accepted Answer

A)  Incisors 
B)  Canines 
C)  Premolars 
D)  Molars 
E)  All mammal teeth are deciduous 
A)  Incisors 
B)  Canines 
C)  Premolars 
D)  Molars 
E)  All mammal teeth are deciduous

Question 10

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

Accepted Answer

A)  each pulse repeatedly rises and falls in frequency. 
B)  the rate of pulse production declines as the bat nears an 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. 
E)  None of the choices are correct 
A)  each pulse repeatedly rises and falls in frequency. 
B)  the rate of pulse production declines as the bat nears an 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. 
E)  None of the choices are correct

Question 11

Which is NOT a correct association of ruminant stomach segment and function?

Accepted Answer

A)  Abomasum-true acid stomach with proteolytic enzymes 
B)  Reticulum-final chamber where undigested pulp is stored for disposal 
C)  Omasum-water, soluble food, and microbial products are absorbed 
D)  Rumen-first chamber where cud is formed 
E)  All of the choices are correct ruminant associations 
A)  Abomasum-true acid stomach with proteolytic enzymes 
B)  Reticulum-final chamber where undigested pulp is stored for disposal 
C)  Omasum-water, soluble food, and microbial products are absorbed 
D)  Rumen-first chamber where cud is formed 
E)  All of the choices are correct ruminant associations

Question 12

Rhinoceros horns differ from other horns or antlers because they

Accepted Answer

A)  are not attached to the skull. 
B)  are shed annually. 
C)  consist of hair-like keratinized filaments that arise from dermal papillae cemented together but not attached to the skull. 
D)  are one big hair follicle. 
E)  can be easily harvested from living animals without harming the animal. 
A)  are not attached to the skull. 
B)  are shed annually. 
C)  consist of hair-like keratinized filaments that arise from dermal papillae cemented together but not attached to the skull. 
D)  are one big hair follicle. 
E)  can be easily harvested from living animals without harming the animal.

Question 13

All mammalian skin glands are derivatives of the __________.

Accepted Answer

The answer of All mammalian skin glands are derivatives of...

Question 14

Egg-laying mammals,such as the duck-billed platypus,are collectively called ___________.

Accepted Answer

The answer of Egg-laying mammals,such as the duck-billed platypus,are collectively...

Question 15

The teeth of mammals are

Accepted Answer

A)  homodont. 
B)  placoid. 
C)  diphyodont. 
D)  polydont. 
E)  continuously replaced. 
A)  homodont. 
B)  placoid. 
C)  diphyodont. 
D)  polydont. 
E)  continuously replaced.

Question 16

Discuss the significance of the evolution of a true placenta.Why would this have been an evolutionary milestone?

Accepted Answer

The evolution of a true placenta is sign

Question 17

The earliest mammals

Accepted Answer

A)  were endothermic, although probably not as warm as modern mammals. 
B)  had two sets of teeth, deciduous and permanent teeth. 
C)  were small mouse-sized animals. 
D)  arose in the late Triassic. 
E)  All of the choices are correct 
A)  were endothermic, although probably not as warm as modern mammals. 
B)  had two sets of teeth, deciduous and permanent teeth. 
C)  were small mouse-sized animals. 
D)  arose in the late Triassic. 
E)  All of the choices are correct

Question 18

Discuss the relative advantages and disadvantages of placental and marsupial modes of reproduction.

Accepted Answer

Placental and marsupial modes of reprodu

Question 19

The smaller the mammal

Accepted Answer

A)  the less oxygen it uses per gram of body weight. 
B)  the lower its metabolic rate. 
C)  the less food it needs to consume per gram of its body weight. 
D)  the more food it needs to consume per gram of its body weight. 
E)  the less it needs lungs. 
A)  the less oxygen it uses per gram of body weight. 
B)  the lower its metabolic rate. 
C)  the less food it needs to consume per gram of its body weight. 
D)  the more food it needs to consume per gram of its body weight. 
E)  the less it needs lungs.

Question 20

Why should the loss of lumbar ribs in cynodonts be correlated with the evolution of a diaphragm? What else may have been provided by the loss of lumbar ribs in this lineage?

Accepted Answer

The loss of lumbar ribs in cynodonts may

Exam 28: Mammals

Hair is produced by the layer of skin called the __________.

Place Paranthropus robustus,Ardipithecus ramidus,Sahelanthropus tchadensis,Australopithecus anamensis,Australopithecus africanus, Australopithecus afarensis,Homo erectus,Homo habilis,and Homo sapiens in a general phylogeny.Where do the Neanderthals fit into this scheme,and why?

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

The so-called mammal-like reptiles of the early Mesozoic from which the modern mammals descended were the ____________.

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

A raccoon or bear that eats both plants and animals for food is

Discuss the recent fossil evidence on the origin of whales.What evidence suggests that they are the sister group to the hippopotamus?

The final chamber of the four-chambered ruminant stomach is a "true" stomach where normal digestion takes place,called the __________.

Although there are exceptions,which of the following teeth are never deciduous in most mammals?

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

Which is NOT a correct association of ruminant stomach segment and function?

Rhinoceros horns differ from other horns or antlers because they

All mammalian skin glands are derivatives of the __________.

Egg-laying mammals,such as the duck-billed platypus,are collectively called ___________.

The teeth of mammals are

Discuss the significance of the evolution of a true placenta.Why would this have been an evolutionary milestone?

The earliest mammals

Discuss the relative advantages and disadvantages of placental and marsupial modes of reproduction.

The smaller the mammal

Why should the loss of lumbar ribs in cynodonts be correlated with the evolution of a diaphragm? What else may have been provided by the loss of lumbar ribs in this lineage?

Life: Biological Principles and the Science of Zoology

The Origin and Chemistry of Life

Cells As Units of Life

Cellular Metabolism

Genetics: a Review

Organic Evolution

The Reproductive Process

Principles of Development

Architectural Pattern of an Animal

Taxonomy and Phylogeny of Animals

Unicellular Eukaryotes

Sponges and Placozoans

Radiate Animals

Acoelomorpha,Platyzoa,and Mesozoa

Polyzoa and Kryptrochozoa

Molluscs

Annelids and Allied Taxa

Smaller Ecdysozoans

Trilobites, Chelicerates, and Myriapods

Crustaceans

Support, Protection, and Movement

Chaetognaths, Echinoderms, and Hemichordates

Chordates

Fishes

Early Tetrapods and Modern Amphibians

Amniote Origins and Nonavian Reptiles

Birds

Support, protection, and Movement

Homeostasis: Osmotic Regulation, Excretion, and Temperature Regulation

Homeostasis: Internal Fluids and Respiration

Digestion and Nutrition

Nervous Coordination: Nervous System and Sense Organs

Chemical Coordination: Endocrine System

Immunity

Animal Behavior

Animal Distributions

Animal Ecology

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