Choose the one most appropriate letter for each.
-tunicates

A)cartilaginous skeleton; jaws
B)reptile with four-chambered heart
C)separate openings for the urinary, reproductive, and excretory systems
D)legless amphibian
E)invertebrate chordate; no metamorphosis
F)endotherm with feathers
G)limbless reptile
H)most primitive fishes with jaws; extinct
I)modern-day parasitic jawless vertebrate
J)North America's only native marsupial
K)adults are barrel-shaped and secretes a covering of polysaccharides
L)egg-laying mammal
M)swim bladder for buoyancy
N)larvae typically have gills and develop lungs as they mature