Cephalochordata

Which of the following are the three extant subphyla of Phylum Chordata?

• Cephalochordata, Tunicata, Vertebrata

• Myxini, Hyperoartia, Chondrichthyes

• Actinopterygii, Sarcopterygii, Tetrapoda

• Amphibia, Sauropsida, Mammalia

Which of the following is NOT one of the five chordate synapomorphies?

• Notochord

• Dorsal Tubular Nerve Cord

• Paired fins

• Post-Anal Tail

What is the common name for organisms belonging to the Subphylum Cephalochordata?

• Tunicates

• Hagfish

• Lancelets

• Lampreys

What is the primary function of the pharyngeal gill slits in lancelets?

• Respiration

• Food capture

• Reproduction

• Movement