chordates

Question 1

Phylum chordata derived it’s name from

Answer 1

presence of notochord in it’s species

Question 2

purpose of notochord is to

Answer 2

support and stiffen the body

Question 3

the CNS of chordates is

Answer 3

Dorsal and hollow

Question 4

all chordates have ___ in embryonic stage

Answer 4

paired gill opening

Question 5

chordates are divided into

Answer 5

lower chordates
higher chordates

Question 6

In higher chordates notochord replaced by

Answer 6

vertebral column

Question 7

higher chordates are also called __

Answer 7

craniates

Question 8

lower craniates are called __

Answer 8

acraniates / protochordata

Question 9

protochordata / acraniates are divided into __ sub phylums

Answer 9

1. Urochordata
2. Cephalochordata

Question 10

Urochordates are also called __

Answer 10

Tunicates

Question 11

ex of urochordata

Answer 11

molgula

Question 12

example of cephalochord?

Answer 12

amphioxus

Question 13

Notochord and nerve cord run through entire length of body in ?

Answer 13

cephalochord

Question 14

Vertebrates are divided into two classes

Answer 14

1. Class pisces
2. Class tetrapod

Question 15

Amniotes are absent in

Answer 15

cyclostomata
chondrichthyes } Class Pisces
osteichthyes
amphibian } Class Amphibian

Question 16

Amniotes are present in

Answer 16

reptiles
aves
mammals

Question 17

Cyclostomata is also called

Answer 17

Agnatha

Question 18

Most primitive living vertebrates without jaw are included in class

Answer 18

cyclostomata / agnatha

Question 19

pair of gills in cyclostomate

Answer 19

6-14 pair of gills

Question 20

example of cyclostomata?

Answer 20

Lampreys
Hagfishes

Question 21

hagfishes sexuality?

Answer 21

hermaphrodite

Question 22

skeleton of cyclostomata is

Answer 22

cartilaginous skeleton is present

Question 23

Heart has __ auricle in cyclostomata

Answer 23

one auricle

Question 24

Chondrichthyes includes __

Answer 24

Sharks and Rays

Question 25

Chondrichthyes have __ skeleton

Answer 25

Cartilage

Question 26

body of Chondrichthyes is __

Answer 26

Fusiform

Question 27

Chondrichthyes have _ scales on body

Answer 27

placoid scales

Question 28

Chondrichthyes have __ stomach

Answer 28

J-shaped

Question 28

___ pair of gills are present in Chondrichthyes

Answer 28

5-7 pairs

Question 29

Sharks reach the length of

Answer 29

30-50 feet

Question 30

Shark liver oil is used as source of Vitamin

Answer 30

A and D

Question 31

_have no swim bladder

Answer 31

Chondrichthyes

Question 32

Osteichthyes are called __ fishes

Answer 32

bony fishes

Question 33

__ chambered heart is present in Osteichthyes

Answer 33

2

Question 34

Brain of Osteichthyes have __ pair of cranial nerves

Answer 34

10

Question 35

group of ancient fishes is known as

Answer 35

Dipnoi

Question 36

dipnoi developed __ for breathing in terrestial mode

Answer 36

lungs

Question 37

the first vertebrates to come to land __

Answer 37

amphibian

Question 38

_ are borderline between aquatic and terrestrial animals

Answer 38

Amphibian

Question 39

Amphibians are resembling __ and __

Answer 39

fish and reptiles

Question 40

heart of amphibian is _ chambered

Answer 40

3

Question 41

amphibian are ___ blooded

Answer 41

cold (poikilothermic)