Pikaia Gracilens,the Earliest Known Chordate Collected from the Burgess Shale

Q31: The development of a new vertebrate head

Q32: Although several invertebrate groups have been proposed

Q33: A notochord is most correctly defined as<br>A)a

Q34: Appendicularians<br>A)are sexually mature individuals that have retained

Q35: While several invertebrate groups (phyla)have in the

Q37: Outline the process that may explain how

Q38: The skeletal rod found in all chordates

Q39: In both tunicates and cephalochordates,the ventral side

Q40: The ammocoete larvae is important in zoology

Q41: Larval and adult tunicates look virtually nothing