Pisces Group

Question 1

What does Devonian mean?

Answer 1

age of fishes

Question 2

Pisces is divided into these classes

Answer 2

Class myxini, Class Cephalospidomorphi, Class Chondrichthyes, Class Osteichthyes,

Question 3

in subphylum craniate, the notochord is replaced by the _________

Answer 3

Backbone

Question 4

What else distinguishes craniates from other chordates?

Answer 4

Segmentation found in muscles and vertebra

Question 5

Class Myxini is commonly known as the_______

Answer 5

Hagfish

Question 6

Class myxini’s primary food source?

Answer 6

Detritus - decaying tissue

Question 7

members of Class Myxini have _____ skeletons

Answer 7

Cartilaginous

Question 8

All members of group pisces have ______ hearts

Answer 8

2 chambered

Question 9

Defense mechanism of Myxini?

Answer 9

slime

Question 10

What were the results of the Cambrian Explosion?

Answer 10

Vertebrates developed more complex nervous systems and advanced skeletal systems as well as more effective means of prey capture and predator evasion.

Question 11

Class Cephalospidomorphi are commonly known as ______

Answer 11

Lamprey, or jawless fish.

Question 12

Class Cephalospidomorphi have ______ skeletons

Answer 12

Cartilaginous

Question 13

what is unique about class Cephalospidomorphi’s cartilaginous skeleton?

Answer 13

It is different from cartilaginous fish skeletons because it contains no collagen. (it has a stiff protein matrix)

Question 14

what has a stif cartilaginous pipe around its notochord with stiff dorsal projections?

Answer 14

Class Cephalospidomorphi

Question 15

Myxini are found in _______

Answer 15

marine habitats only

Question 16

Cephalospidomorphi are found in ___________

Answer 16

freshwater and marine habitats

Question 17

Life style of Cephalospidomorphi

Answer 17

parasitic

Question 18

Class placodermi are found_______

Answer 18

No where, the are extinct

Question 19

Class Chondrichthyes are known as ___________

Answer 19

Bony fish

Question 20

Class Chondrichthyes include

Answer 20

Sharks, skates, and rays

Question 21

What class of Group Pisces posses a lateral line?

Answer 21

Class Chondrichthyes

Question 22

Class Chondrichthyes contain _____ in blood. For what purpose?

Answer 22

Urea. Osmoregulation

Question 23

Do all fish have swim bladders?

Answer 23

No, Class Chondrichthyes does not and only some of Class Osteichythyes do

Question 24

Teeth are modified from what structure in Class Chondrichthyes

Answer 24

scales

Question 25

Sharks can be Oviparous or Ovoviviparous. what is the difference?

Answer 25

Oviparous means that eggs hatch outside the mothers body. Ovoviviparous means eggs hatch inside the uterus.

Question 26

Class Osteichythyes are also known as _______

Answer 26

Bony fish

Question 27

in Osteichythyes, cartilage in the skeleton is replaced by ______

Answer 27

Calcium phosphate

Question 28

What is an Operculum?

Answer 28

Gill covering. Found in Osteichythyes

Question 29

Most Osteichythyes have what type of fertilization?

Answer 29

external

Question 30

Most Chondrichthyes have what type of fertilization?

Answer 30

internal

Question 31

What are Gnathostomes?

Answer 31

Jawed vertebrates

Question 32

Gnathostomes include,

Answer 32

sharks and their relatives, ray-finned fishes, lobe-finned fishes, amphibians, reptiles, birds, and mammals

Question 33

Osteichthyes have 2 subclasses ______ and ________

Answer 33

Sarcopterygii (fleshy finned fish, or lungfish & Lobe finned fish), and Actinopterygii (ray finned)

Question 34

Sarcopterygii include ______

Answer 34

Coelacanths

Question 35

Actinopterygii

Answer 35

Most common fish. Include Goldfish, bass, catfish, Moray eel, etc.