Jo O'Bar
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Study guide for Marine Mammals in Marine Verts class

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Jo O'Bar
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Marine Mammals

Question 1 of 17

1

Synapsid skulls:

Select one of the following:

  • presence of single lower temporal fenestra

  • presence of single higher temporal fenestra

  • presence of several lower temporal fenestras

  • presence of several higher temporal fenestras

Explanation

Question 2 of 17

1

Therapsids are early ancestors of mammals

Select one of the following:

  • True
  • False

Explanation

Question 3 of 17

1

Mammal fossils are identified by...

Select one or more of the following:

  • skull

  • ball-and-socket articulation

  • post-canine teeth with divided roots

  • tiny stature

  • vivipary

  • mammary glands

Explanation

Question 4 of 17

1

Extant mammal traits include:

Select one or more of the following:

  • hair

  • mammary glands

  • viviparity

  • parental care

  • complex social behavior

  • oviparity

  • pouches

Explanation

Question 5 of 17

1

Features of early Mammaliaformes include...

Select one or more of the following:

  • Endothermy

  • determinate growth

  • 2 sets of teeth

  • enlarged olfactory lobes, cerebellum, neocortex

  • hair

  • lactation

  • suckling

  • exothermy

Explanation

Question 6 of 17

1

: (extinct) -- small rodent-like omnivores with broad multi-cusped teeth
: -- refers to cloaca with one opening for excretory and reproductive tracts
: -- prolonged lactation, pouch
Eutheria: placentals -- prolonged gestation

Drag and drop to complete the text.

    Allotheria
    Multituberculates
    Prototheria
    Monotremes
    Metatheria
    marsupials

Explanation

Question 7 of 17

1

Select from the dropdown lists to complete the text.

Metatheria includes two sub-groups: the ( Ameridelphia, Australidelphia, Allotheria, Prototheria ), or opossums, and the ( Australidelphia, Ameridelphia, Prototheria, Allotheria ), which include the Tasmanian devil, Tasmanian tiger, bandicoot, and others.

Explanation

Question 8 of 17

1

Prototheria, or monotremes, include which animals?

Select one or more of the following:

  • enchidnas

  • opossums

  • tasmanian tiger

  • platypus

  • koala

  • kangaroo

Explanation

Question 9 of 17

1

The __________ is also known as the age of Mammals

Select one of the following:

  • Mesozoic

  • Cretaceous

  • Jurrassic

  • Paleozoic

Explanation

Question 10 of 17

1

Select from the dropdown lists to complete the text.

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

Explanation

Question 11 of 17

1

During which periods were the primary radiations in Mesozoic Mammals?

Select one or more of the following:

  • Jurassic

  • Cretaceous

  • Triassic

  • Cenozoic

Explanation

Question 12 of 17

1

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

Explanation

Question 13 of 17

1

5% of all mammals are marine

Select one of the following:

  • True
  • False

Explanation

Question 14 of 17

1

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Marine mammals in ( Order Carnivora, Order Sirenia and Order Cetariodactyla, Order Amphibia ) are amphibious, while those in ( Order Sirenia and Order Cetariodactyla, Order Carnivora, Order Sirenia and Order Cetacea ) are wholly marine.

Explanation

Question 15 of 17

1

Cetacea and includes the s (baleen whales) and (toothed whales)

Drag and drop to complete the text.

    Infraorder
    Order
    Suborder
    Mysticeti
    Odontoceti

Explanation

Question 16 of 17

1

Adaptations to marine habitat include...

Select one or more of the following:

  • large body size

  • axial swimming

  • flippers and loss of hind limbs

  • countercurrent exchange

  • carangiform body shape

  • swim bladders

Explanation

Question 17 of 17

1

What is axial swimming?

Select one of the following:

  • undulations of bady and tail via dorsoventral fexion

  • undulations of body and tail via lateral flexion

Explanation

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