A dorsal tubular nerve cord is
A) another name for the notochord.
B) a strip of cartilage that forms a back and tail.
C) primitive tissue that forms bone vertebrae.
D) an early nerve cord that enlarges at one end to form the brain and also extends through vertebrae.
E) None of the choices is correct.
Correct Answer:
Verified
Q10: Modification of the pharyngeal slits for first
Q11: All chordates have
A)a single,dorsal,tubular,nerve cord.
B)a ventral heart.
C)pharyngeal
Q12: One example of why a cladist is
Q13: Appendicularians
A)are sexually mature individuals that have retained
Q14: Organisms that retain the larval form of
Q16: The name Urochordata means literally
A)"tail chordates."
B)"head chordates."
C)"kidney
Q17: The phylum Urochordata includes the classes
A)Ascidiacea,Cephalaspidomorphi,and Myxini.
B)Appendicularia,Cephalochordacea,and
Q18: The perforated pharynx of chordates first evolved
Q19: A notochord is most correctly defined as
A)a
Q20: Salps in the class Thalacea
A)are barrel-shaped open-ocean
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