The first jaws evolved from:
A) gill bars
B) vertebral spines
C) pectoral girdle
D) none of the above
Correct Answer:
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Q49: An example of a nonvertebrate chordate is:
A)a
Q50: Vertebrates include:
A)birds
B)mammals
C)reptiles
D)all of the above
Q51: The phylum Chordata and the phylum Arthropoda
Q52: Endothermy refers to:
A)maintaining stable body temperature through
Q53: Diphyodonty refers to:
A)the development of two sets
Q55: The early vertebrates differed from the earlier
Q56: The development of the amniote egg was
Q57: Humans belong to the phylum:
A)Echinodermata
B)Chordata
C)Arthropoda
D)Mollusca
Q58: Within the amniote egg,the embryo is contained
Q59: A multicellular organism that synthesizes food from
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