Two characteristics that are unique to mammals are hair and mammary glands.
Correct Answer:
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Q4: True horns are
A)the same as antlers.
B)restricted to
Q5: Some northern-dwelling mammals molt to blend in
Q6: Mammals appeared in the Mesozoic,but did not
Q7: The therapsids were the first mammals.
Q8: Carnivorous animals have a longer digestive tract,and
Q10: The structures that are not derivatives of
Q11: In contrast to birds,very few mammals make
Q12: All members of order Carnivora are carnivorous
Q13: Mammals belong to the
A)anapsid lineage of amniotes.
B)synapsid
Q14: The glands that produce an oily substance
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