CVA Exam1 Questions and Correct
Answers
3 Major Lineages of Phylum Chordata - Answer-Craniata
Urochordata
Cephalochordata
What are craniata? - Answer-Vertebrates with skulls and Hagfish
What are Urochordata? - Answer-Tunicates
What are Cephalochordata? - Answer-Lancelets
What are characteristics of chordata? - Answer-Bilaterally symmetric, deuterostome ceolomates, most
are active and longitudinally differentiated into head, trunk and tail.
What are the four shared derived traits of the phylum chordata? - Answer-Notochord
Dorsal Hollow nerve cord
, Subpharyngeal Organ (endostyle) that binds iodine
Post-anal tail
What is the pharynx? - Answer-Throat
What is ancestral trait of chordata? - Answer-Pharyngeal clefts
What are clefts? - Answer-Pouches with cleft-like depressions connecting pharynx to exterior (may form
slits)
What are arches? - Answer-Supporting structures of soft and skeletal tissues
What does the vagus region nerve control in the embryonic stage? - Answer-Heartbeat, meaning that if
the neck is broken, your heart will still beat
What are the chordate characteristics that show up in a certain lifestage of the urochordata? - Answer-
In the larval stage, tunicates have a notochord, dorsal hollow nervord, postanal tail, and pharyngeal slits
What is the only thing remaining in the adult tunicates that resemble chordate characteristics? -
Answer-Perforated pharynx
What are the pharyngeal slits used for in Cephalochordata (Lancelets)? - Answer-Suspension feeding
and not respiration
What is a myomere? - Answer-Blocks of skeletal muscles separated by connective tissues
What do cephalochordates have? - Answer-Coelom, external body cavity called the atrium that open at
the atriopore at which it eliminates water that passes through the pharyngeal slits
Answers
3 Major Lineages of Phylum Chordata - Answer-Craniata
Urochordata
Cephalochordata
What are craniata? - Answer-Vertebrates with skulls and Hagfish
What are Urochordata? - Answer-Tunicates
What are Cephalochordata? - Answer-Lancelets
What are characteristics of chordata? - Answer-Bilaterally symmetric, deuterostome ceolomates, most
are active and longitudinally differentiated into head, trunk and tail.
What are the four shared derived traits of the phylum chordata? - Answer-Notochord
Dorsal Hollow nerve cord
, Subpharyngeal Organ (endostyle) that binds iodine
Post-anal tail
What is the pharynx? - Answer-Throat
What is ancestral trait of chordata? - Answer-Pharyngeal clefts
What are clefts? - Answer-Pouches with cleft-like depressions connecting pharynx to exterior (may form
slits)
What are arches? - Answer-Supporting structures of soft and skeletal tissues
What does the vagus region nerve control in the embryonic stage? - Answer-Heartbeat, meaning that if
the neck is broken, your heart will still beat
What are the chordate characteristics that show up in a certain lifestage of the urochordata? - Answer-
In the larval stage, tunicates have a notochord, dorsal hollow nervord, postanal tail, and pharyngeal slits
What is the only thing remaining in the adult tunicates that resemble chordate characteristics? -
Answer-Perforated pharynx
What are the pharyngeal slits used for in Cephalochordata (Lancelets)? - Answer-Suspension feeding
and not respiration
What is a myomere? - Answer-Blocks of skeletal muscles separated by connective tissues
What do cephalochordates have? - Answer-Coelom, external body cavity called the atrium that open at
the atriopore at which it eliminates water that passes through the pharyngeal slits
