Organisms That Retain the Larval Form of Their Evolutionary Ancestors

Q2: Chordates typically have<br>A)a notochord.<br>B)radial cleavage.<br>C)the anus derived

Q13: The jawless vertebrates are called Agnatha,and the

Q13: One example of why a cladist is

Q22: Unlike most invertebrate phyla,the nerve cord of

Q25: The ostracoderms<br>A)are the adult form of the

Q36: Pikaia gracilens,the earliest known chordate collected from

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

Q47: The characteristics of the chordates and the

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

Q57: The lancelet reproduces<br>A)by asexual processes alone.<br>B)by budding.<br>C)sexually