Vertebrates - Fish and Amphibians Flashcards
Are vertebrae a defining characteristic of vertebrates?
No
What is the main feature that separates vertebrates from other chordates?
All of them have skulls
What ectoderm protein is unique to vertebrates?
Keratin
What is the integument?
The tough outer protective shell
Did early vertebrates have a skeleton or jaw?
No
Which of the 3 had vertebral structures? Conodonts, Hagfishes, or Lampreys?
Lampreys
What is the oldest extant vertebrate?
Hagfishes
Were jaws part of the skull when they first appeared?
No
What did teeth derive from?
Skin
What are tetrapods?
Vertebrates possessing 4 limbs in their primary body plan
What are the only vertebrates that aren’t tetrapods?
Fish
What is the ancestor of tetrapods?
Lobe-finned fish
Where did lungs evolve from?
The swim bladder
Do amphibian eggs have protective structures and membranes?
No
What are the 3 main groups of amphibians?
Anurans, Caudata/Urodeles, Gymnophiona/Caecilians
