superclass osteichthyes

Question 1

what are some characteristics of the organisms of osteichthyes?

Answer 1

bony fishes, have ossified endoskeleton, operculum, swim bladder

Question 2

what is the operculum?

Answer 2

a protective bony flap

Question 3

how do organisms in this class reproduce?

Answer 3

oviparous with eggs fertilized externally

Question 4

what classes does this superclass contain?

Answer 4

actinopterygii and sarcopterygii

Question 5

what organisms are in the class actinopterygii and what do they contain?

Answer 5

ray finned fishes with bony rays

Question 6

what organisms are in the class sarcopterygii?

Answer 6

lobe finned fishes

Question 7

how are lobe finned fishes built?

Answer 7

consist of rod shaped bones covered by a thick layer of muscle in their pectoral/pelvic fins

Question 8

what are the 3 lineages still alive today?

Answer 8

coelacanths, lungfishes, and the lineage that gave rise to tetrapods

Question 9

how do lungfishes survive?

Answer 9

burrow into mud using mucous and going into a low energy state

Question 10

what suggests that lungfishes may be ancestral to modern terrestrial vertebrates?

Answer 10

presence of functional lungs