The sail-like fin on the pelycosaur may have served as all but ...

[hubes95]

The sail-like fin on the pelycosaur may have served as all but which of the following?
  a. sexual display
  b. a means of locomotion
  c. a means of protection
  d. a means of defense
  e. a thermoregulatory device

Question 2

The feature that distinguishes the two subclasses of bony fish is their:a.
   gill structure.
  b. skeletal structure.
  c. fin structure.
  d. teeth structure.
  e. scale structure.

[briezy]

Answer to Question 1

B

Answer to Question 2

C

[hubes95]

TYSM

[raenoj]

Thanks for the timely response, appreciate it