Vertebrate Diversity: Fish

What is the term for vertebrates lacking jaws?

• Agnatha

• Anamniota

• Amniota

• Gnathostomata

Which group of vertebrates develops embryos within a fluid-filled sac?

• Amniota

• Agnatha

• Anamniota

• Gnathostomata

What is the earliest known vertebrate fossil period?

• Devonian

• Ordovician

• Mesozoic

• Cambrian

Which of the following is a living jawless fish?

• Teleost

• Coelacanth

• Hagfish

• Placoderm

How many species of hagfishes are recognized?

• 1200

• 78

• 41

• 119

What type of skeleton do cartilaginous fishes have?

• Chitinous

• Cartilaginous

• Fibrous

• Bony

Which clade includes sharks, skates, and rays?

• Holocephali

• Chondrichthyes

• Actinopterygii

• Sarcopterygii

What is the largest clade of ray-finned fishes?

• Cladistia

• Teleosts

• Chondrosteans

• Neopterygians

Which of the following is a characteristic of lobe-finned fishes?

• Lack jaws

• Have paired pectoral and pelvic fins

• Have a cartilaginous skeleton

• Only found in freshwater

What is the primary diet of hagfishes?

• Algae

• Dead or dying animals

• Live fish

• Plankton