Author: Anonymous

___ is a synapomorphy of the gnathostomes. (This synapomorphy is an “advance” that gnathostomes made over other animals. The ancestor of all gnathostomes had it, but not primitive chordates. In the PowerPoints, you saw these characters mapped on phylogenies)

Baby kangaroos spend much of their time inside the ____ (=pouch) of their mother. 

Tuataras only occur on the islands of ___.

What are chaetae?

The modern amphibians include frogs, salamanders, and ___. Amphibians in this last group look like earthworms and have dermal scales embedded in their skin. 

Today, there are very few lobe-finned fishes. Most bony fish are ___-finned fishes. 

All chordate embryos have a skeletal rod named a ___. In adults, vertebrae replace this structure in most chordates.

In coralsnakes, ___ and ___ colored bands are in contact. Whereas these colors are separate in their mimics

The ___ were a group of agnathans with skin covered in bony plates.

Cartilagenous fishes have a pair of ___ used in copulation. These structures are part of the pelvic fins.