Chordata (Fishes)

Question 1

_____ have the most species and classes among all vertebrates

Answer 1

fishes

Question 2

body form or shapes of fishes

Answer 2

most species are fusiforms, some are globiforms, anguilliforms, filiforms, compressed, depressed, trachipteriforms, truncated, and attenuated

Question 3

the fish body is divided into

Answer 3

head, trunk, tail, and appendages

Question 4

the head and the trunk of fishes are separated by ______

Answer 4

gill openings

Question 5

gill openings in bony fishes are covered by _____

Answer 5

opercle

Question 6

the ______ and the _______________ mark the boundary of the trunk and tail

Answer 6

anus, urogenital openings

Question 7

the eyes have no eyelid except some ______ and ______

Answer 7

sharks and bony fishes

Question 8

some sharks have _________ for eyelids

Answer 8

nictitating membranes

Question 9

some bony fishes have _______ for eyelids

Answer 9

permanent adipose eyelids

Question 10

the ______, ______ , and _______ are located in the head

Answer 10

mouth, 4 nares, gills/ slits

Question 11

an opening, the ______ found between the anteriormost gill slit and the eye connects the outside to the pharyngeal cavity.

Answer 11

spiracle

Question 12

Fishes (and aquatic stages of amphibians) possess a set of linearly concentrated skin sense organs known as

Answer 12

lateral - line systems

Question 13

The microscopically small openings or ______ of the sense organs open in the skin or scales.

Answer 13

pores

Question 14

In most fishes, a series of these pores, extending along each side in a single row from the head to the caudal fin, comprises the _______

Answer 14

lateral line

Question 15

The appendages comprise the ______and _______ which are stifened by bony rays (lepidotrichia) in bony fishes and by horny rays (ceratotrichia) in catilaginous fishes.

Answer 15

median and paired fins

Question 16

The median fins are on the ________, on the lower edge of the body behind the ____________ and ______________

Answer 16

back (dorsal fin or fins); naus (anal fin) and the tail (caudal fin)

Question 17

_______ (small fins in a series) and rayless, fatty _____ fins may also be developed in the median axis behind the dorsal and anal fins.

Answer 17

Finlets; adipose

Question 18

The paired fins are the _________ and ________

Answer 18

pectoral fins and the pelvic fins (or ventral fins)

Question 19

The _____ have become lost in various forms notably the eels, modified into _____ in sharks and relatives, or part of a _________ in clingfishes and other fishes.

Answer 19

ventrals/ pelvic fins; claspers; holdfast organ

Question 20

The position of the pectorals is _____ when it is located towards the dorsal side of the body and ____ when it is located towards the ventral side.

Answer 20

high; low

Question 21

The anteriormost part of the fin base or attachment of the fin is the ____ and the posteriormost part of the fin base is the ______.

Answer 21

origin; insertion

Question 22

The fin rays supporting fins in bony fishes are of two kinds, what are they?

Answer 22

spines, single unsegmented, unbranched rays) and soft-rays (Biserial, segmented, often branched rays).

Question 23

Types of caudal fins

Answer 23

protocercal, diphycercal, heterocercal, homocercal