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| What is the biological species concept? |
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| Species are groups of freely interbreeding natural populations that are reproductively isolated from other such groups. |
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| Ruffled grouse, guan, quail, wild turkey |
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| Albatross, shearwater, petrel |
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| Cormorant, frigatebird, boobies, anhinga, gannet |
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| Pelicans, herons, bitterns, egrets, ibis, spoonbill |
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| Diurnal birds of prey: hawk, vultures, osprey, condor, kite, eagle |
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| Falcons, kestrel, caracara |
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| Shorebirds: plover, sandpiper, gull, tern, auk, skua, skimmer, murre, puffin |
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| Cuckoos, roadrunner, anis |
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| Woodpecker, jacamar, toucan, puffbirds, barbet |
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| most diverse, over half of all extant bird species |
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| What are some of the purposes of feathers? |
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| Heat regulation, ornamentation, flight |
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| What is a crop? Do all birds have crops? |
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| The crop serves as a location for temporary food storage. Not all birds have crops. |
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| What purpose does the gizzard serve? |
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| The gizzard is the portion of the digestive tract prior to the stomach that functions in the physical breakdown of food. |
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| What does the term oviparous mean? |
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| What are the two bird-dinosaur evolution theories? Which is the current accepted theory? |
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1. Thecodont Hypothesis- Birds evolved BEFORE dinosaurs from thecodonts
2. Theropod Hypothesis- Birds evolved from theropod dinosaurs ***ACCEPTED*** |
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| Which feathers are intended for flight purpose? Which aren't? |
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Flight: Asymmetrical
Non-flight: Symmetrical |
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