Vertebrates Differ from Other Chordates Because They Have a Brain

Q13: Amphioxus is certainly not the ancestor of

Q13: The jawless vertebrates are called Agnatha,and the

Q14: In both tunicates and cephalochordates,the ventral side

Q15: The reptiles,as well as the agnathans,are considered

Q16: Garstang's hypothesis of vertebrate evolution is the<br>A)annelid-vertebrate

Q18: Pikia,the earliest known chordate collected from the

Q19: The phylum Urochordata includes the<br>A)Ascidiacea and Cephalaspidomorphi.<br>B)Larvacea

Q22: Unlike most invertebrate phyla,the nerve cord of

Q22: The most likely candidate for the vertebrate

Q29: Lancelets belong to the subphylum _.