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Study
Vertebrates Part 3
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Why do birds have only one ovary and small gonads?
to reduce body weight for flight
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What are the three main living lineages of mammals?
monotremes, marsupials, eutherians
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Primates typically have:
flat nails, forward-facing eyes, and grasping hands
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What is an example of a flight adaptation in birds?
hollow bones, lack of a urinary bladder, keratin bladder
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A bird species is found to have large breast muscles, hollow bones, and a beak with no teeth. What function are these features most related to?
flight
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What structural adaptation in bird wings allows lift and thrust?
asymmetrical feathers with hooks and barbs
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What animal group has nostrils that open to the side and often have a prehensile tail?
New World monkeys
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What group of vertebrates has the most specialized and diverse teeth suited for different diets?
mammals
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What group includes flightless birds like emus and penguins?
ratites
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What feature of mammals contributes to parental care?
mammary glands
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What distinguishes Homo sapiens from other apes?
bipedalism
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What trait allows primates to perceive depth well?
forward-looking eyes
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What role do feather likely play in flightless birds like penguins?
buoyancy and insulation
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What group of mammals are fully aquatic?
cetaceans
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What characteristics is shared by ALL primates?
five digits and flat nails
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What feature helps mammals support high metabolic rates?
efficient respiratory and circulatory systems
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Birds maintain their body temperature through:
endothermy
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A newly disovered animal has the following traits: amniotic egg, keratin scales, and ectothermy. Which group does it most likely belong to?
reptiles
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Which part of the primate body has adapted for tool use and grasping?
the forelimbs and opposable thumbs
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A fossil shows an animal with differentiated teeth, fur impressions, and three middle ear bones. What can paleontologists conclude?
it was a mammal
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