WK1 Flashcards
(6 cards)
1
Q
What are the two characteristics of vertebrates?
A
Cranium and Vertebral elements
2
Q
What is another term form jawed vertebrates?
A
gnathostome
3
Q
What features of a gnathostome differ from agnathans (jawless vertebrates)?
A
Jaws with teeth and two sets of paired fins
4
Q
What could be the function
of a proto-jaw, before it
was effective as jaw?
A
Hypothesis: Jaws were initially
useful for increasing the strength
of gill ventilation as well as suction feeding
5
Q
True or False: Agnathans have no jaw
A
True
6
Q
Biodiversity is…?
A
the variation among genes, species and
functional traits
