Exam 2 Vocabulary

Question 1

The taxonomic grouping Agnatha is defined by __

Answer 1

Jawless fishes

Question 2

What are examples of Agnatha species?

Answer 2

Hagfish, Lamprey

Question 3

The taxonomic group Gnathostomata is defined by __

Answer 3

Jawed fishes

Question 4

What are two categories within Gnathostomata?

Answer 4

Bony fishes, Cartilaginous fishes

Question 5

What is class Sarcopterygii defined by?

Answer 5

Lobed (muscular) fins

Question 6

What is class Actinopterygii defined by?

Answer 6

Ray fins

Question 7

What is a Chondrichthye?

Answer 7

Fishes with cartilaginous skeletons

Question 8

What is Osteichthyes another term for?

Answer 8

Bony fishes

Question 9

What does craniate describe?

Answer 9

Fishes with a skull that
surrounds a brain, olfactory organs, eyes, and inner ear

Question 10

What is the subclass of ray-finned fishes that contains most living fish species today?

Answer 10

Teleost

Question 11

How do chondrichthyes regulate buoyancy?

Answer 11

Low density, light tissues and large fins to generate lift

Question 12

How do teleosts regulate buoyancy?

Answer 12

Swim bladders, fins for lift

Question 13

Four features that allowed teleosts to be so successful?

Answer 13

Locomotion, efficient sensory system, high reproductive potential, efficient respiratory system

Question 14

What direction does water flow over lamellae in the gills in relation to bloodflow?

Answer 14

Counterflow

Question 15

What is the operculum?

Answer 15

Bony flap located over the gills

Question 16

What is the pharynx?

Answer 16

Oral cavity

Question 17

What are the nares?

Answer 17

Nostrils, located in front of the eyes