The Classification System Used Today Began with the Work of

Q20: The _ is the thin mesodermal lining

Q21: Which of the following is correctly written?<br>A)Panthera

Q22: Organisms in this phyla do not exhibit

Q23: Each species has a unique name; _

Q24: The back (usually upper)surface of a bilateral

Q25: The domain that is unique for having

Q26: The absence of a central point or

Q27: Similar characteristics between animals that are the

Q28: Formation of a distinct head is called<br>A)ventralization.<br>B)anteriorization.<br>C)lateralization.<br>D)dorsalization.<br>E)cephalization.

Q30: The "belly" (usually lower)surface of most bilaterally