Other Terms Flashcards
1
Q
Urochordata
A
Larvae resemble chordates, adults are sessile and have outer tunic
2
Q
Cephalochordata
A
Distinct anterior and posterior end, blood flows forward centrally and caudad dorsally
3
Q
Hemichordata
A
Acorn worms, closest relative of Chordata, possess pharyngeal slits
4
Q
Protostomes
A
Blastopore becomes mouth
5
Q
Deuterostomes
A
Blastopore becomes anus
6
Q
Pikaia
A
Earliest fossil chordate
7
Q
Symplesiomorphy
A
Shared ancestral characteristics
8
Q
Synapomorphy
A
Shared derived characteristics
9
Q
Plesiomorphy
A
Shared ancestral trait
10
Q
Apomorphy
A
Derived trait
11
Q
Grade
A
Common ancestor and some, but not all, of its descendants
12
Q
“protochordates”
A
Urochordata and Cephalochordata
