Marine Mammals

Jo O'Bar
Quiz by Jo O'Bar, updated more than 1 year ago
Jo O'Bar
Created by Jo O'Bar over 2 years ago
13
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Description

Study guide for Marine Mammals in Marine Verts class

Resource summary

Question 1

Question
Synapsid skulls:
Answer
  • presence of single lower temporal fenestra
  • presence of single higher temporal fenestra
  • presence of several lower temporal fenestras
  • presence of several higher temporal fenestras

Question 2

Question
Therapsids are early ancestors of mammals
Answer
  • True
  • False

Question 3

Question
Mammal fossils are identified by...
Answer
  • skull
  • ball-and-socket articulation
  • post-canine teeth with divided roots
  • tiny stature
  • vivipary
  • mammary glands

Question 4

Question
Extant mammal traits include:
Answer
  • hair
  • mammary glands
  • viviparity
  • parental care
  • complex social behavior
  • oviparity
  • pouches

Question 5

Question
Features of early Mammaliaformes include...
Answer
  • Endothermy
  • determinate growth
  • 2 sets of teeth
  • enlarged olfactory lobes, cerebellum, neocortex
  • hair
  • lactation
  • suckling
  • exothermy

Question 6

Question
[blank_start]Allotheria[blank_end]: [blank_start]Multituberculates[blank_end] (extinct) -- small rodent-like omnivores with broad multi-cusped teeth [blank_start]Prototheria[blank_end]: [blank_start]Monotremes[blank_end] -- refers to cloaca with one opening for excretory and reproductive tracts [blank_start]Metatheria[blank_end]: [blank_start]marsupials[blank_end] -- prolonged lactation, pouch Eutheria: placentals -- prolonged gestation
Answer
  • Allotheria
  • Multituberculates
  • Prototheria
  • Monotremes
  • Metatheria
  • marsupials

Question 7

Question
Metatheria includes two sub-groups: the [blank_start]Ameridelphia[blank_end], or opossums, and the [blank_start]Australidelphia[blank_end], which include the Tasmanian devil, Tasmanian tiger, bandicoot, and others.
Answer
  • Ameridelphia
  • Australidelphia
  • Australidelphia
  • Ameridelphia
  • Allotheria
  • Prototheria
  • Prototheria
  • Allotheria

Question 8

Question
Prototheria, or monotremes, include which animals?
Answer
  • enchidnas
  • opossums
  • tasmanian tiger
  • platypus
  • koala
  • kangaroo

Question 9

Question
The __________ is also known as the age of Mammals
Answer
  • Mesozoic
  • Cretaceous
  • Jurrassic
  • Paleozoic

Question 10

Question
The [blank_start]Mesozoic[blank_end], or the "true age of mammals," represents [blank_start]2/3[blank_end] of mammalian history. there are about [blank_start]300[blank_end] genera known from this period, although most were some form of [blank_start]mouse[blank_end]. Although this has historically been attributed to the fall of dinosaurs, recent evidence suggest that patterns of [blank_start]plant[blank_end] evolution had a greater influence on mammal diversity,
Answer
  • Mesozoic
  • Paleozoic
  • Cretaceous
  • 2/3
  • 1/2
  • 1/3
  • 1/4
  • 300
  • 200
  • 500
  • 400
  • mouse
  • dog
  • lemur
  • monkey
  • plant
  • bird
  • bacterial

Question 11

Question
During which periods were the primary radiations in Mesozoic Mammals?
Answer
  • Jurassic
  • Cretaceous
  • Triassic
  • Cenozoic

Question 12

Question
The end-Cretaceous extinctions also affected mammals: lost [blank_start]marsupials[blank_end] and archaic type [blank_start]placentals[blank_end]. Mammals quickly recovered, but did not really start to diversify again until the [blank_start]Cenozoic[blank_end].
Answer
  • marsupials
  • monotremes
  • rodents
  • placentals
  • monotremes
  • cetaceans
  • Cenozoic
  • Paleozoic
  • Proterozoic

Question 13

Question
5% of all mammals are marine
Answer
  • True
  • False

Question 14

Question
Marine mammals in [blank_start]Order Carnivora[blank_end] are amphibious, while those in [blank_start]Order Sirenia and Order Cetariodactyla[blank_end] are wholly marine.
Answer
  • Order Carnivora
  • Order Sirenia and Order Cetariodactyla
  • Order Amphibia
  • Order Sirenia and Order Cetariodactyla
  • Order Carnivora
  • Order Sirenia and Order Cetacea

Question 15

Question
[blank_start]Infraorder[blank_end] Cetacea and includes the [blank_start]Suborder[blank_end]s [blank_start]Mysticeti[blank_end] (baleen whales) and [blank_start]Odontoceti[blank_end] (toothed whales)
Answer
  • Infraorder
  • Order
  • Suborder
  • Mysticeti
  • Odontoceti

Question 16

Question
Adaptations to marine habitat include...
Answer
  • large body size
  • axial swimming
  • flippers and loss of hind limbs
  • countercurrent exchange
  • carangiform body shape
  • swim bladders

Question 17

Question
What is axial swimming?
Answer
  • undulations of bady and tail via dorsoventral fexion
  • undulations of body and tail via lateral flexion
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