Questions and Answers
What are the five key characteristics that chordates possess?
Notochord, hollow dorsal nerve cord, pharyngeal slits, endostyle, and post-anal tail.
What is the difference in the presence of notochord in the three subphyla of Chordata?
In Urochordata, notochord is present only in larval tail; in Cephalochordata, notochord extends from head to tail region and is present throughout life; in Vertebrata, notochord is present during the embryonic period but is replaced by a vertebral column in adults.
List the seven classes within the subphylum Vertebrata?
The classes within the subphylum Vertebrata are Agnatha, Chondrichthyes, Osteichthyes, Amphibia, Reptilia, Aves, and Mammalia.
How many subphyla are found within the phylum Chordata and what are they?
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Do all vertebrates belong to the subphylum Vertebrata?
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