Marine Science Unit 8 Test

The skeletons of sharks is made of...

• Bone
• Cartilage

What is the name of the internal structure that controls a bony fish's depth in the water?

• Liver

• Air Pocket

• Lung Bladder

• Swim Bladder

The tail fin of a fish is also known as the __________ fin.

• Pectoral

• Pelvic

• Dorsal

• Caudal

What kind of scales does a shark have?

• Placoid
• Ganoid
• Ctenoid
• Cycloid

Lampreys and hagfish lack

• teeth

• heads

• mouths

• jaws

This is the organ where gas exchange occurs in fish.

• Gills

• Lungs

• Heart

• Operculum

What does the fish class name "Agnatha" mean?

• Jawless

• Cartilage fish

• Bony Fish

• Toothy

Marine iguanas:

• live on rocky coastlines
• feed on seaweed
• are found only on Galapagos Islands
• all of the above are correct

How many species of sea turtles are there?

• 7

• 42

• 16

• 85

The largest species of sea turtle is the....

• green sea turtle

• hawksbill sea turtle

• leatherback sea turtle

• flatback sea turtle