PHYLUM CNIDARIA

Question 1

Takes its name from cells called cnidoctes,
which contain stinging organelles

Answer 1

CNIDARIA

Question 2

(formed only by cnidarians)

Answer 2

nematocysts

Question 3

they are widespread in marine habitats and few in
freshwater

Answer 3

CNIDARIA

Question 4

they are mostly sessile/slow swimming/slow moving

Answer 4

CNIDARIA

Question 5

Found mostly in shallow marine habitat
(warm temperatures and tropical regions)

Answer 5

CNIDARIA

Question 6

where are Cnidariansmostly found?

Answer 6

shallow marine, warm temp and tropical regions

Question 7

cnidarians takes its name from cells called

Answer 7

cnidocytes

Question 8

Bodies have distinct tissues but no

Answer 8

organs

Question 9

are nearly all marine

Answer 9

Cnidarians

Question 10

are diploblastic

Answer 10

Cnidarians

Question 11

how many germ layers do cnidarians have

Answer 11

2 germ layers

Question 12

what are the two germ layers of cnidaria

Answer 12

Ectoderm (epidermis) and endoderm (gastrodermis)

Question 13

Ectoderm

Answer 13

(epidermis)

Question 14

endoderm

Answer 14

(gastrodermis)

Question 15

gelatinous material between the two germ layers

Answer 15

(mesoglea)

Question 17

body plan of cnidaria

Answer 17

Radial Symmetry

Question 18

what end do cnidaria have

Answer 18

oral and aboral

Question 19

Contains oral and aboral end but no

Answer 19

definite end

Question 20

Two basic types of individuals of cnidaria:

Answer 20

polyps and medusae

Question 21

Body with two layers:

Answer 21

epidermis and gastrodermis with mesoglea

Question 22

with single opening that
serves as both mouth and anus;

Answer 22

Gastrovascular cavity:

Question 23

what cavity do cnidaria have

Answer 23

Gastrovascular cavity

Question 24

extensible
tentacles usually encircling the mouth or oral
region

Answer 24

Gastrovascular cavity

Question 25

Gastrovascular cavity: with single opening that serves as both

Answer 25

mouth and anus

Question 26

extensible tentacles usually encircling the --- or ------------

Answer 26

mouth or oral region

Question 27

4 class under phylum cnidaria

Answer 27

class Hydrozoa class Anthozoa class Cubozoa class Scyphozoa

Question 28

(most variable class)

Answer 28

CLASS HYDROZOA

Question 29

("true jellyfish")

Answer 29

CLASS SCHYPHOZOA

Question 30

(cube jellyfishes)

Answer 30

CLASS CUBOZOA

Question 31

(corals and sea anemones)

Answer 31

CLASS ANTHOZOA

Question 32

has 200 species -- all marine

Answer 32

Class Scyphozoa

Question 33

has 4 orders

Answer 33

Class Scyphozoa

Question 34

example is Sea wasps

Answer 34

Class Cubozoa

Question 35

has One order and 2 families

Answer 35

Class Cubozoa

Question 36

has 7 orders

Answer 36

Class Hydrozoa

Question 37

has over 2,700 species

Answer 37

Class Hydrozoa

Question 38

this class is All marine

Answer 38

Class Anthozoa

Question 39

About 2/3 of all described cnidarians are contained in this class

Answer 39

Class Anthozoa

Question 40

has 15 orders

Answer 40

Class Anthozoa

Question 41

3 order under class Hydrozoa

Answer 41

Order Hydroida Order Siphonophora Order Hydrocorallina

Question 42

2 subclasses under Class Anthozoa

Answer 42

Subclass Hexacorallia Subclass Octocorallia

Question 43

According to pre-molecular phylogenies, the ----------- and ------ were grouped either separately or together to form the RADIATA

Answer 43

Cnidaria and Ctenophora

Question 44

* According to pre-molecular phylogenies, the Cnidaria and Ctenophora were grouped either separately or together to form the RADIATA,whereas all of the ‘higher’ animals were grouped within the

Answer 44

Bilateria

Question 45

it was theorized that -------- were considered to be basal to the Anthozoa,Cubozoa and Scyphozoa

Answer 45

Hydrozoa

Question 46

it waa theorized that Within the phylum Cnidaria, the Hydrozoa were considered to be basal to the

Answer 46

Anthozoa,Cubozoa and Scyphozoa

Question 47

the bi-radial or bilateral symmetry of anthozoans could be interpreted as having independently evolved within the

Answer 47

Cnidaria