BIOL 230 Final Exam QUESTIONS WITH ANSWERS

BIOL 230 Final Exam QUESTIONS WITH
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ANSWERS

What is the common ancestor of all mammals? -
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CORRECT ANSWERS ✔✔Pelycosaurs |\ |\




What does heterodont mean? - CORRECT ANSWERS
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✔✔Different types of teeth for different functions |\ |\ |\ |\ |\ |\




What were theraspids? - CORRECT ANSWERS ✔✔Type of
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Pelycosaur that had its limbs situated beneath its body
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like a quadroped
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What is a cytodaunt? - CORRECT ANSWERS ✔✔A type of
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dinosaur that later lead to the formation of mammals.
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Possessed a high metabolic rate, a diaphragm, 3 middle
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ear bones, and was an endotherm
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What characterizes a mammal skull - CORRECT ANSWERS
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✔✔Muscular jaw, heterodont and diphyodont dentition,
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and a secondary bony palate
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, What does a secondary bony palate do? - CORRECT
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ANSWERS ✔✔Allows the mammal to suckle and breathe
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at the same time, also allows for facial expressions
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What are the characteristics that all mammals share? -
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CORRECT ANSWERS ✔✔3 middle ear bones, mammary
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glands, sweat glands, hair, a diaphragm, and a neocortex
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in the brain
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What are the two types of mammal hair? - CORRECT
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ANSWERS ✔✔Under and Guard hair |\ |\ |\ |\




What does Under hair do? - CORRECT ANSWERS ✔✔Used
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for insulation and to keep aquatic mammals from getting
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wet


What is Guard hair for? - CORRECT ANSWERS ✔✔For
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protection and coloration |\ |\




What do hair cells decompose into? - CORRECT ANSWERS
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✔✔Keratin


What do Sebaceous Glands do? - CORRECT ANSWERS
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✔✔Secrete Sebum, which keeps skin/hair moist and|\ |\ |\ |\ |\ |\ |\



pliable