A structure found in lancelets (cephalochordates) but not in tunicates (urochordates) is
A) a vertebral column.
B) a notochord.
C) a hollow dorsal nerve cord.
D) the vascular system.
E) blocks of muscle for movement.
Correct Answer:
Verified
Q7: The tube feet in echinoderms are extended
Q8: Excretion of nitrogenous wastes in Echinoderms is
Q9: The earliest larval stage of echinoderms
A) is
Q10: Chordates are so named because of their
A)
Q11: At some stage of development, chordates possess
A)
Q13: All craniates have
A) a distinct head with
Q14: Vertebrae
A) are characteristic of all chordates.
B) are
Q15: Jawed vertebrates have jaws derived from
A) dermal
Q16: Many features unique to vertebrates develop from
Q17: Fishes are divided into two classes, Chondrichthyes
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