Chondrichthyes

Which Phylum does sharks, skates, rays and bony fish belong to?

• Agnatha

• Gnathostomata

• Osteichthyes

• Chordate

What kind of scales does a shark have?

• Placoid
• Ganoid
• Ctenoid
• Cycloid

What adaptation did sharks develop to maintain buoyancy?

• Fluid in the ears

• Gas filled bladder

• Large oily liver

• Nictitating membrane

What are the electroreceptors in the head of sharks, skates, and rays capable of detecting week electrical signals produced by muscular activity in other creatures?

• Nictitating membrane

• Chondrichthyes

• Schwann cells

• Ampullae of Lorenzini

What is the collective name for sharks, rays and skates?

• Ichthyes

• Chondrichthes

• Holocephalii

• Dipnoi

Tags

NGSS.MS-LS4-2

What other animals are in Class Chondrichthes that aren't sharks?

• Rays

• Skates

• Starfish

• Salmon

Cartilaginous fish are different from most bony fish because...

• Bony fish are larger than cartilaginous fish

• Cartilaginous fish cannot swim as fast as bony fish

• Cartilaginous fish do not have a bony skeleton

• Bony fish have a skeleton of cartilage

Tags

NGSS.MS-LS4-2

What are the pair of holes used by skates/rays in their respiratory system?

• Spiracle

• Gills

• Snout

• Nose

What is the top fin called?

• Ventral

• Dorsal

• Caudal

• Pectoral

What is an adaptation by sharks that enhances visual sensitivity under low light conditions.

• Sclera

• Iris

• Tapetum lucidum

• Cornea