Unit 9: Fish

Which animal belongs to the class Osteichthyes?

• whale shark

• blue marlin

• hagfish

• stingray

Which animal belongs to the class Chondrichthyes?

• sailfish

• swordfish

• moray eel

• skate

Which of the following is NOT a major physical characteristic feature of cartilaginous fish?

• placoid scales which feels like sandpaper

• prominent dorsal fins

• movable jaws with well-developed teeth

• paired lateral fins

Hagfishes and lampreys lack ___________ and are the most primitive fish.

• spine

• eyes

• jaws

• scales

Shark scales have the same composition as their

• bone

• teeth

• eyes

The lateral line system enables a fish to

• detect vibrations in the water.

• see objects at a distance.

• smell.

• swim rapidly.

The covering over the eye in a shark

• Nictitating membrane

• Tympanic membrane

• Eustachian tubes

• Glottis

Some organisms, like rays, exchange gases through the sides of their body through tiny holes called _______.

• spiracles

• diffusion

• lungs

• oxygen

The cloaca is a "multi-purpose opening" for solid and liquid waste products as well as reproductive fluids.

• True

• False

The shark in the picture has claspers. Is it a female or a male?

• Female

• Male