Test
Exam 1: Diversity and Evolution
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Preguntas del test (22)
1Marine mammals are a diverse assemblage of distantly related mammals that spend all or part of their time in the marine (or aquatic) environment.
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2Balaenoptera musculus is a skim feeding whale that can be identified to individual based upon the pigmentation pattern of its flukes.
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3The West Indies distinct population segment of Megaptera novaeangeliae, found along the US and Canadian coasts, has been taken off the Endangered Species list.
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4The Family Kogiidae contains the dwarf and pygmy sperm whales.
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5The crabeater seal, found in Antarctica, is the most numerically abundant of all pinniped species.
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6The discovery of Enaliarctos supported the hypothesis that pinnipeds were diphyletic.
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7Members of the Family Ziphiidae are mostly shallow divers that utilize their large number of specialized, crushing teeth to eat their lobster and crab prey.
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8The minke whale is both the smallest and most abundant balaenopterid species.
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9Ursus maritimus is threatened by global climate change and melting sea ice.
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10Eumetopias jubatus, the largest otariid species, maintains a polygynous mating system.
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11Leptonychotes weddelli is a voracious predator that hunts ringed seals.
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12The narwhal is a member of the odontocete family that contains the largest number of species.
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13Tasmacetus shepherdi has never been sighted alive, and is known only from stranded specimens.
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14A paraphyletic clade is one that contains an ancestor and only some of its descendants, and is an evolutionary "invalid" group.
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15The vaquita and Hector's dolphin are both endemic species, which enhances their vulnerability to negative human impacts.
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16What is/are TRUE regarding the species represented here? (Picture showed a manatee)
- AThis species was down-listed from endangered to threatened in 2017.
- BThey have an unusual pattern of tooth growth called horizontal replacement.
- CThey are hund-gut digesters.
- DAll of the above
- Ea and b only
17The species shown here, Enhydra lutris, (sea otter)
- Ais the smallest of all marine mammals
- Bwas protected under the 1911 North Pacific Fur Seal Convention, which also protected Callorhinus ursinus.
- Cuses its hind-limbs to produce drag based thrust forces
- Da and b only
- Ea and c only
18Which is the following is/are TRUE regarding this species? (walrus)
- AIt is threatened by global climate change
- BLike the narwhal, this species' tusks erupt only in males, as a secondary sexual character
- CIt is a member of the most speciose pinniped family
- Da and b only
- Ea and c only
19What is true about the FAMILY of pinnipeds to which this species belongs? (Showed seal...don't remember what species but must be a Phocid seal, or "true seal".)
- AIts members possess elongate digits 1 and 5 on the foot of their hind-limb.
- BIt contains 90% of the estimated 50-75 million individual pinnipeds on the Earth today.
- CIts members possess scrotal testes.
- Da and b only
- Eb and c only
20The individual shown here, Hydrodamalis gigas, (Steller's sea cow)
- Awas a member of the Family Trichechidae
- Bdisplayed unusual oblique tooth replacement throughout its life
- Cwas extinct within 27 tears of its discovery by the Russian explorer, Steller
- Da and b only
- Eall of the above
21The species shown here, (Northern right whale)
- Ais known as a rorqual whale, as it possesses ventral groove blubber
- Bis in the same family with the whale that possesses the longest baleen of any mysticete
- Chas a common name that means it was the right whale to kill
- Da and c only
- Eb and c only
22Which of the following is/are TRUE regarding the northern elephant seal, Mirounga angustirostris?
- AIts name reflects its family's close evolutionary relationship to elephants and hydraxes
- BThis species is highly endangered, with only a few hundred individuals surviving today
- CBoth the northern and the southern elephant seals are extremely deep diving pinnipeds
- Dall of the above
- Ea and b only
Información
- Descripción
- (Exam 1: Diversity and Evolution) Marine Mammals Test sobre Exam 1: Diversity and Evolution , creado por Bri Landino el 26/02/2019.
- Autor
- Bri Landino
- Idioma
- English
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- 0
- Historial
- Creado el 26 feb 2019 · actualizado el 27 feb 2019
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