Aq. Science Ch. 17 Sharks Exam

Sharks, skates, and rays have a skeleton made of _______________ instead of a bones.

• fibrous tissue

• spongin

• cartilage

• spicules

Chondrichthyes include _________

• sharks only

• sharks and skates only

• skates and rays only

• sharks, skates, and rays

What kind of scales does a shark have?

• Placoid
• Ganoid
• Ctenoid
• Cycloid

What is the special electroreceptor organs near the sharks have to detect prey and know where to go during migration?

• Ampullae of Lorenzini

• electro fields

• placoid scales

• nose hairs

Sharks have a hole behind the eye called a ___________ and its function is ________________________

• Spiracle:

  to pump water to gills

• Pit Organ:

  for hearing and balance

• Ampulla of Lorenzini:

  for Electrosensing

The tail fin that aid with propulsion is called the:

• Pectoral fin

• Dorsal fin

• Caudal fin

• Pelvic fin

To sense vibrations, sharks have a _________________ that contains fluid-filled sensory canals that run from head to tail.

• spiracle

• lateral line

• operculum

• dorsal fin

All vertebrates belong to which PHYLUM?

• Vertebrate

• Endotherm

• Chordata

which of the following is heterodontiformes

• 
• 
• 
• 

What is a shark's adaptation to maintain neutral buoyancy?

• Fluid in the ears
•  Gas filled bladder
• Large oily liver
• Nictitating membrane