3Hair and Mammary Glands Chapter 30Mammals30.1 Mammalian CharacteristicsHair and Mammary GlandsTwo characteristics that distinguish members of class Mammalia from other vertebrate animals are hair and mammary glands.
4Functions of Hair Insulation Camouflage Sensory devices Waterproofing Chapter 30Mammals30.1 Mammalian CharacteristicsFunctions of HairInsulationCamouflageSensory devicesWaterproofingSignalingDefense
5Other Characteristics Chapter 30Mammals30.1 Mammalian CharacteristicsOther CharacteristicsEndothermySource of body heat is internal.Heat is produced by a high metabolic rate.Body temperature is regulated by internal feedback mechanisms.
6Chapter 30Mammals30.1 Mammalian CharacteristicsFeeding and DigestionDaily intake of food is used to generate heat to maintain a constant body temperature.
730.1 Mammalian Characteristics Chapter 30Mammals30.1 Mammalian CharacteristicsVisualizing the Digestive Systems of Mammals
9Reveal the life habits of a mammal Chapter 30Mammals30.1 Mammalian CharacteristicsTeethReveal the life habits of a mammalCarnivores use canines to stab and premolars to slice and shear meat.Incisors of insectivores are long and curved, functioning as pincers in seizing insect prey.
10Kidneys excrete or retain the proper amount of water in body fluids. Chapter 30Mammals30.1 Mammalian CharacteristicsExcretionKidneys excrete or retain the proper amount of water in body fluids.Enables mammals to live in extreme environmentsMammals
11Mammals are the only animals that have a diaphragm. Chapter 30Mammals30.1 Mammalian CharacteristicsRespirationHigh levels of oxygen are required to maintain a high level of metabolism.Mammals are the only animals that have a diaphragm.
1230.1 Mammalian Characteristics Chapter 30Mammals30.1 Mammalian CharacteristicsCirculationMammals require a consistent supply of nutrients and oxygen to maintain homeostasis.Keeping oxygenated and deoxygenated blood separate makes the delivery of nutrients and oxygen more efficient.
1330.1 Mammalian Characteristics Chapter 30Mammals30.1 Mammalian CharacteristicsThe Brain and SensesMammals have highly developed brains.Cerebral cortex is responsible for coordinating conscious activities, memory, and the ability to learn.Cerebellum is responsible for balance and coordinating movement.
14Complex Behavior Senses Chapter 30Mammals30.1 Mammalian CharacteristicsComplex BehaviorSensesThe importance of the senses varies from one group of mammals to the next.GlandsA system of glands secretes a variety of fluids that helps to regulate a mammal’s internal environment.
15In mammals, the egg is fertilized internally. Chapter 30Mammals30.1 Mammalian CharacteristicsReproductionIn mammals, the egg is fertilized internally.Development of the embryo takes place in the female uterus.MovementMammals must find food, shelter, and escape from predators.
16Mammal Classification Chapter 30Mammals30.2 Diversity of MammalsMammal ClassificationMonotremesMarsupialsPlacental mammals
17Reproduce by laying eggs Chapter 30Mammals30.2 Diversity of MammalsMonotremesReproduce by laying eggsDuck-billed platypusEchidnaEchidna
18Very short period of development in the uterus Chapter 30Mammals30.2 Diversity of MammalsMarsupialsVery short period of development in the uterusCrawl into a pouch made of skin and hair and continue development while being nourished by milk from the mother’s mammary glandsKangaroo
19Chapter 30Mammals30.2 Diversity of MammalsPlacental MammalsGive birth to young that do not need further development within a pouchShrewRepresented by 18 ordersHumpback whale
21Chapter 30Mammals30.2 Diversity of MammalsEvolution of Mammals
22Limbs positioned beneath their bodies Chapter 30Mammals30.2 Diversity of MammalsTherapsidsA therapsid is an extinct vertebrate with both mammalian and reptilian features.Pair of holes in the roof of the skull that allowed for the attachment of jaw musclesLimbs positioned beneath their bodiesMight have been endotherms
23Chapter Resource Menu Chapter Diagnostic Questions MammalsChapter Resource MenuChapter Diagnostic QuestionsFormative Test QuestionsChapter Assessment QuestionsStandardized Test Practicebiologygmh.comGlencoe Biology TransparenciesImage BankVocabularyAnimationClick on a hyperlink to view the corresponding lesson.
24Name the term that refers to a mammal’s Chapter 30MammalsChapter Diagnostic QuestionsName the term that refers to a mammal’sability to produce heat internally.endodermendothermyectodermectothermy
25What classification of mammals reproduces by laying eggs? Chapter 30MammalsChapter Diagnostic QuestionsWhat classification of mammals reproducesby laying eggs?marsupialplacental mammalmonotremetherapsid
26A mammal’s period of gestation refers to what? Chapter 30MammalsChapter Diagnostic QuestionsA mammal’s period of gestation refers to what?amount of time the young stays with its herdamount of time the young stays in the uterusamount of time the young drinks its mother’smilkamount of time for the young to matureenough to reproduce
27Which characteristics distinguish mammals from other vertebrates? Chapter 30Mammals30.1 Formative QuestionsWhich characteristics distinguish mammalsfrom other vertebrates?kidneys and a cloacamammary glands and haira high metabolic rate and limbsa four-chambered heart and endothermy
28What is the tough, fibrous protein that makes Chapter 30Mammals30.1 Formative QuestionsWhat is the tough, fibrous protein that makesup hair, nails, claws, and hooves?ureakeratincellulosecollagen
29What is the source of body heat for mammals? Chapter 30Mammals30.1 Formative QuestionsWhat is the source of body heat formammals?hibernationinsulationmetabolismrespiration
30Which part of the brain is more highly Chapter 30Mammals30.1 Formative QuestionsWhich part of the brain is more highlydeveloped in mammals than in otheranimals?cerebrumhypothalamusmedullaoptic lobe
31What is a group of cells that secretes fluid to Chapter 30Mammals30.1 Formative QuestionsWhat is a group of cells that secretes fluid tobe used elsewhere in the body?a bladdera ducta glandan organ
32Which mammals have reptilian features, such as laying eggs? Chapter 30Mammals30.2 Formative QuestionsWhich mammals have reptilian features,such as laying eggs?cetaceansmarsupialsmonotremessirenians
33Which mammals use their two pairs of razor- Chapter 30Mammals30.2 Formative QuestionsWhich mammals use their two pairs of razor-sharp incisor teeth to gnaw through wood,seed pods, or shells to get food?artiodactylsinsectivoreslagomorphsrodents
34Which animals are cetaceans? Chapter 30Mammals30.2 Formative QuestionsWhich animals are cetaceans?deer and goatsmoles and shrewsdolphins and whalesmanatees and dugongs
35Why did mammals undergo extraordinary Chapter 30Mammals30.2 Formative QuestionsWhy did mammals undergo extraordinaryadaptations to the environment after thedisappearance of dinosaurs?They had new niches available to them.They were able to survive the ice age.They were no longer prey to dinosaurs.They no longer competed with dinosaurs.
36True or False The graph shows that large animals such as elephants Chapter 30MammalsChapter Assessment QuestionsTrue or FalseThe graph showsthat large animalssuch as elephantshave a highmetabolic rate.
37Select the mammal that is a member of the order Chiroptera. Chapter 30MammalsChapter Assessment QuestionsSelect the mammal that is a member of theorder Chiroptera.hedgehogapeanteaterbat
38Compare the digestive tracts of the deer and Chapter 30MammalsChapter Assessment QuestionsCompare the digestive tracts of the deer andthe fox. Infer why the deer’s digestive tract isso much longer.Answer: It takes longer and is more difficultto digest plant material than meat.
39Which animal eats the least amount of food Chapter 30MammalsStandardized Test PracticeWhich animal eats the least amount of foodas a percentage of its body mass?elephantshrew
40Why is a high metabolic rate necessary for the shrew’s survival? Chapter 30MammalsStandardized Test PracticeWhy is a high metabolic rate necessary for theshrew’s survival?
41Its body loses heat quickly. It has a short digestive tract. Chapter 30MammalsStandardized Test PracticeIts body loses heat quickly.It has a short digestive tract.It carries out complex behavior.It produces milk for its offspring.
42herbivore’s digestive tract compare to the digestive tract of this Chapter 30MammalsStandardized Test PracticeHow does aherbivore’s digestivetract compare to thedigestive tract of thiscarnivore?
43An herbivore will have… Chapter 30MammalsStandardized Test PracticeAn herbivore will have…a shorter digestive tract and a smaller cecum.a shorter digestive tract and a larger cecum.a longer digestive tract and a larger cecum.a longer digestive tract and a smaller cecum.
44How do ruminants benefit from having bacteria in their stomachs? Chapter 30MammalsStandardized Test PracticeHow do ruminants benefit from havingbacteria in their stomachs?They can be omnivorous.They can digest meat.They can filter urea.They can process cellulose.
45Which teeth are more highly developed in a mountain lion? Chapter 30MammalsStandardized Test PracticeWhich teeth are more highly developed in amountain lion?caninesincisorsmolarspremolars
46What is believed to have caused the isolation Chapter 30MammalsStandardized Test PracticeWhat is believed to have caused the isolationof marsupials’ ancestors to Australia andnearby islands?adaptive radiationcontinental drifthabitat destructionreproductive isolation
47What competitive adaptive advantage do Chapter 30MammalsStandardized Test PracticeWhat competitive adaptive advantage doplacental mammals have over marsupials?a more highly developed digestive systema pair of holes in the roof of the skulllimbs positioned beneath their bodiesmore highly evolved social behavior