Usually We Think of Evolution Acting on Organisms with Different

Q45: The urochordates are enclosed in a nonliving

Q46: Cephalochordates<br>A)are small fish-like,freshwater animals.<br>B)have a notochord only

Q47: The characteristics of the chordates and the

Q48: Outline the five chordate features.What is the

Q49: What feature(s)can be found in the ammocoete

Q51: Organisms that retain the larval form of

Q52: Adult ascidian tunicates have<br>A)a notochord.<br>B)pharyngeal slits.<br>C)a dorsal

Q53: Are the jawless ostracoderms a real taxon

Q54: Walter Garstang's hypothesis of vertebrate evolution could

Q55: Of the five chordate hallmarks,adult tunicates have