d. The notochord of non-vertebrate chordates does not become a vertebral column.
e. Non-vertebrate chordates do not have a internal bony skeleton while all other chordates do.
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Question 10
Which of the following characteristics is NOT a distinguishing feature of all primates?
Select one:
a. opposable thumb
b. fingernails
c. usually single birth
d. extended period of parental care
e. expanded hindbrain
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Question 11
Which of these is a proper contrast between birds and mammals?
Select one:
a. Birds are cold-blooded; mammals are warm-blooded.
b. Birds are egg laying; no mammals lay eggs.