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

Hair is produced by the ___________ layer of the skin.or

Accepted Answer

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

Question 3

The North American mammal that shows 10-year cycles in population density,and that is preyed upon by lynx and other predators,is the ______ ______.

Accepted Answer

The answer of The North American mammal that shows 10-year...

Question 4

White fur of winter animals is due to

Accepted Answer

A) albinism,where a recessive gene blocks formation of pigments. 
B) chromatophores,just as occurs in amphibians and reptiles that change their colors. 
C) leukemism,a simple seasonal change in pigment. 
D) aging of hair follicle cells induced by cold temperatures. 
E) None of the choices is correct 
A) albinism,where a recessive gene blocks formation of pigments. 
B) chromatophores,just as occurs in amphibians and reptiles that change their colors. 
C) leukemism,a simple seasonal change in pigment. 
D) aging of hair follicle cells induced by cold temperatures. 
E) None of the choices is correct

Question 5

Discuss the significance of the evolution of echolocation in bats.Could that partially explain why bats are the most diverse group of mammals today?

Accepted Answer

The evolution of echolocation in bats ha

Question 6

The specialized hairs on the nose that are tactile in function (used to "measure" width of passageways,etc. )are

Accepted Answer

A) guard hairs. 
B) underfur. 
C) vibrissae. 
D) quills. 
E) filamentous hairs. 
A) guard hairs. 
B) underfur. 
C) vibrissae. 
D) quills. 
E) filamentous hairs.

Question 7

During their annual growth,antlers develop beneath a covering of highly vascular skin called ___________.

Accepted Answer

The answer of During their annual growth,antlers develop beneath a...

Question 8

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

Question 9

The adaptive diversification of early mammals was due to

Accepted Answer

A) their homeothermic advantage. 
B) their metabolic efficiency that allowed lower food consumption per unit of body mass. 
C) the independence of their young. 
D) the extinction of many competing amniote groups at the end of the Cretaceous. 
E) their larger size which made them better predators. 
A) their homeothermic advantage. 
B) their metabolic efficiency that allowed lower food consumption per unit of body mass. 
C) the independence of their young. 
D) the extinction of many competing amniote groups at the end of the Cretaceous. 
E) their larger size which made them better predators.

Question 10

Give evidence that suggests that a chorioallantoic placenta was present in the common ancestor of marsupials and placental mammals,but later was lost in most marsupials.

Accepted Answer

One piece of evidence that suggests a ch

Question 11

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 12

The fertility cycle of the female mammal is referred to as the ___________ cycle.

Accepted Answer

The answer of The fertility cycle of the female mammal...

Exam 28: Mammals

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

Hair is produced by the ___________ layer of the skin.or

The North American mammal that shows 10-year cycles in population density,and that is preyed upon by lynx and other predators,is the ______ ______.

White fur of winter animals is due to

Discuss the significance of the evolution of echolocation in bats.Could that partially explain why bats are the most diverse group of mammals today?

The specialized hairs on the nose that are tactile in function (used to "measure" width of passageways,etc. )are

During their annual growth,antlers develop beneath a covering of highly vascular skin called ___________.

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?

The adaptive diversification of early mammals was due to

Give evidence that suggests that a chorioallantoic placenta was present in the common ancestor of marsupials and placental mammals,but later was lost in most marsupials.

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

The fertility cycle of the female mammal is referred to as the ___________ cycle.

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

Architectual Pattern of an Animal

Taxonomy and Phylogeny of Animals

Unicellular Eukaryotes

Sponges and Placozoans

Cnidarians and Ctenophores

Acoelomorpha, Platyzoa, and Mesozoa

Polyzoa and Kryptrochozoa

Molluscs

Annelids and Allied Taxa

Smaller Ecdysozoans

Trilobites, Chelicerates, and Myriapods

Crustaceans

Hexapods

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 Distribution

Animal Ecology

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The North American mammal that shows 10-year cycles in population density,and that is preyed upon by lynx and other predators,is the .