BIOL 1902 Test 2 Exam Questions With Correct Answers

BIOL 1902 Test 2 Exam Questions With
Correct Answers

What are the four environmental stresses? - CORRECT ANSWER✔✔-
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Sub-zero temperatures, mobility, migration, and extreme heat
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Ectotherms - CORRECT ANSWER✔✔-Cold-blooded, temperature
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controlled by external conditions
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Endotherms - CORRECT ANSWER✔✔-Warm-blooded, temperature
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controlled internally |




Guard hairs - CORRECT ANSWER✔✔-protective outer layer of fur
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Underfur - CORRECT ANSWER✔✔-traps body heat
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subcutaneous fat - CORRECT ANSWER✔✔-fat under the skin for
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insulation


brown fat - CORRECT ANSWER✔✔-burned for warmth
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, contour feathers - CORRECT ANSWER✔✔-large feathers that give shape
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to a bird's body and help with flying
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down feathers - CORRECT ANSWER✔✔-dense feathers used for
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insulation


Mammalian adaptations to sub-zero temperatures - CORRECT
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ANSWER✔✔-grow more hair and add extra layers of fat | | | | | | | |




Avian adaptations to sub-zero temperatures - CORRECT ANSWER✔✔-
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grow bulkier feathers, add subcutaneous fat for fuel, shiver to generate
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heat


thermogenesis - CORRECT ANSWER✔✔-heat generation | | | |




gloger's rule - CORRECT ANSWER✔✔-lighter colours retain body heat
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better


allen's rule - CORRECT ANSWER✔✔-smaller extremities lose less heat
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bergmann's tule - CORRECT ANSWER✔✔-lower surface area to volume
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ratio loses less heat
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