Lecture 26

Question 1

What are Osteichthyes

Answer 1

bony fish

Question 2

how many classes of bony fish is there

Answer 2

3

Question 3

What was the original lung of a bony fish modified into

Answer 3

a swim bladder

Question 4

function of lungs & swim bladders

Answer 4

Lungs: respiration
Swim Bladders: provide buoyancy

Question 5

how do fish change the degree of inflation in their swim bladder

Answer 5

by gulping air or from the blood via active diffusion.

Question 6

characteristics of bony fish

Answer 6

-ossified (bony) endoskeleton
-flat plate-like bony scales
-lateral line detect movements and vibrations
-gills covered by operculum
-flexible fins
-external fertilization

Question 7

What are Class Actinopterygii

Answer 7

-ray-finned fish
->99% bony fish

Question 8

What taxa are lungfish and tetrapods

Answer 8

sister taxa

Question 9

What are Class Actinistia

Answer 9

-coelacanth
-only one exact genus
-living fossil

Question 10

What are Class Dipnoi

Answer 10

Lung Fish
-have lobe fins
-gills & lungs
-have buccal pump for lung ventilation

Question 11

What are the 3 classes of bony fish

Answer 11

1. Class Actinopterygii
2. Class Actinistia
3. Class Dipnoi