Pisces

Question 1

Lobe finned fishes are called

Answer 1

Sacopterigii

Question 2

Ray finned fish are termed

Answer 2

Actinopterigii

Question 3

Sharks, rays and skates are termed

Answer 3

Chondchthyes

Question 4

Lampreys are termed

Answer 4

Cephalospidomorphi

Question 5

Hag fishes are called

Answer 5

Myxini

Question 6

List the external features of fishes

Answer 6

Bone
Cartilage
Scale or bony scale plates
Fin rays
Connective tissue

Question 7

List the internal skeleton of fishes

Answer 7

Skull bones ( except the roofing bones of the head).
Fin support (fin rays).
Vertebral column

Question 8

What are the major kind muscles in fishes

Answer 8

Smooth, cardiac and skeletal muscle

Question 9

The circulation of fishes differs from the reptiles, birds, and mammals in that;?

Answer 9

The oxygenated blood does not return to the heart prior to distribution to the other parts of the body

Question 10

List the extinct classes of pisces

Answer 10

Ans: Placodermi
Acanthoidii
Ostracoderms

Question 11

Hag fishes ( mixini) are sometimes known

Answer 11

Slime eels

Question 12

One distinctive feature btw hag fishes and lampreys is____??

Answer 12

The hag fishes have vestigial eyes and the eyes are covered by a thin opaque membrane. Meaning they’re mostly blind

While the lampreys have well developed eyes

Question 13

The larvae form of lampreys are called ___?

Answer 13

Ammocoetes

Question 14

Another name for chondrichthyes is ______?

Answer 14

Selachi

Question 15

The opening behind each eye in most sharks is called—-?

Answer 15

Spiracles

Question 16

The chondrichthyes have 2 extant subclasses which are ________?

Answer 16

Holocephali and elasmobranchii

Question 17

What are claspers

Answer 17

They’re male copulatory organ ( intromittent organ)

Question 18

What are holocephalians?

Answer 18

They’re the chimaeras ( ratfish)

Question 19

What is the difference between holocephali and elasmobranchii.

Answer 19

In holocephali an operculum covers the Gill slits and the teeth is replaced by bony plates.

Question 20

List the subclasses of actinopterygii

Answer 20

Teleostei
Chondrostei
Neopterigii

Question 21

List one distinctive feature of the subclass teleostei…

Answer 21

The subclass teleostei have a homoceral tail.
Meaning the upper and lower tips of its tail are equal

Question 22

Representatives of the subclass chondrostei are___?

Answer 22

Sturgeons and paddlefish

Question 23

A distinctive feature of the subclass neopterigii is_____?

Answer 23

Is that their scales are ganoid scales

Question 24

Sacopterigii have internal nares that open internally into the _____?

Answer 24

Oropharyngeal cavity

Question 25

The 2 order of sacopterigii are______?

Answer 25

Actinistia or crossopterygii and
Rhipidistia( lung fishes)

Question 26

Air breathing fishes are called____???

Answer 26

Rhipidistia