CNIDARIA

Question 1

knife -
aria -

Answer 1

knife - nettle
aria - like or connected with

Question 2

body plan of cnidaria
a. dimorphic
b. asconoid
c. leuconoid

Answer 2

a. dimorphic

Question 3

sessile, hydroid form
a. polyp
b. medusa

Answer 3

a. polyp

Question 4

free-living, jellyfish form
a. polyp
b. medusa

Answer 4

b. medusa

Question 5

polyps and medusa forms both retain ______ body plan

Answer 5

sac -like

Question 6

medusa is essentially _________ with tubular body widened and flattened into bell shape

Answer 6

unattached polyp

Question 7

tubular body with the mouth directed upward and surrounded by tentacles
a. polyp
b. medusa

Answer 7

a. polyp

Question 8

bell or umbrella shaped and exhibit tetramerous symmetry (arranged in fours)
a. polyp
b. medusa

Answer 8

b. medusa

Question 9

mouth centered on the concave side (subumbrellar region) directed downward into frilly lobes that may extend beneath the bell
a. polyp
b. medusa

Answer 9

b. medusa

Question 10

reproduce asexually by budding, fission, or pedal laceration
a. polyp
b. medusa

Answer 10

a. polyp

Question 11

_______ equipped with statocysts (orientation) and ocelli (light sensors)
a. polyp
b. medusa

Answer 11

b. medusa

Question 12

In polyp, if a bud detaches from the polyp that made it, it forms a _____
a. sibling
b. clone
c. colony

Answer 12

b. clone

Question 13

If a bud remains attached to the polyp that made it, it becomes a ______, with shared gastrovascular cavity
a. sibling
b. clone
c. colony

Answer 13

c. colony

Question 14

unique, found in tentacles
a. sensory cell
b. barb
c. cnidocytes

Answer 14

c. cnidocytes

Question 15

can inject toxins for prey capture or defense
a. cnidocytes
b. operculum
c. nematocyst

Answer 15

c. nematocyst

Question 16

mostly marine, colonial with asexual polyp, and sexual medusa stages as in Obelia sp. (dimorphic)
a. Class Hydrozoa
b. Class Syphozoa
c. Class Staurozoa

Answer 16

a. Class Hydrozoa

Question 17

“Cup Animals”
a. Class Hydrozoa
b. Class Syphozoa
c. Class Staurozoa

Answer 17

b. Class Syphozoa

Question 18

Lack shelf like velum found in hydrozoan medusae - not an efficient swimmer
a. Class Hydrozoa
b. Class Syphozoa
c. Class Staurozoa

Answer 18

b. Class Syphozoa

Question 19

They have no medusa stage and are commonly called stauromedusans
a. Class Hydrozoa
b. Class Syphozoa
c. Class Staurozoa

Answer 19

c. Class Staurozoa

Question 20

Solitary polyp body that is stalked; attached to seaweeds and objects on the sea bottom
a. Class Hydrozoa
b. Class Syphozoa
c. Class Staurozoa

Answer 20

c. Class Staurozoa

Question 21

base is a rootlike stolon or hydrorhiza
a. Class Hydrozoa
b. Class Syphozoa
c. Class Staurozoa

Answer 21

a. Class Hydrozoa

Question 22

Margin of the umbrella has indetations, each bearing a pair of lappets
a. Class Hydrozoa
b. Class Syphozoa
c. Class Staurozoa

Answer 22

b. Class Scyphozoa

Question 23

Medusa is the predominant stage
a. Class Cubozoa
b. Class Anthozoa
c. Sea anemone

Answer 23

a. Class Cubozoa

Question 24

_______ house of three sets of unique eyes – two type of ocelli and one set of camera type eyes with cornea and lens

Answer 24

Rhopalia

Question 25

"Flower animals" a. Class Cubozoa b. Class Anthozoa c. Sea anemone

Answer 25

b. Class Anthozoa

Question 26

Most are polyp form and lack a medusa stage a. Class Cubozoa b. Class Anthozoa c. Sea anemone

Answer 26

b. Class Anthozoa

Question 27

Umbrella is square and one or more tentacles extend from each corner a. Class Cubozoa b. Class Anthozoa c. Sea anemone

Answer 27

a. Class Cubozoa

Question 28

All marine in both deep and shallow water and vary in size a. Class Cubozoa b. Class Anthozoa c. Sea anemone

Answer 28

b. Class Anthozoa

Question 29

Multiples of six, also called polymerous symmetry a. Hexamerous plan b. Octomerous plan

Answer 29

a. Hexamerous plan

Question 30

Octomerous plan has _____ tentacles having _____ featherlike tentacles around the mouth a. 4 b. 8 c. 12

Answer 30

b. 8

Question 31

They provide ventilation and clean up for the anemone while getting shelter and protection a. dinoflagellates (zooxanthellae) b. hermit crabs c. damselfishes

Answer 31

c. damselfishes

Question 32

algal photosynthesis a. dinoflagellates (zooxanthellae) b. hermit crabs c. damselfishes

Answer 32

a. dinoflagellates (zooxanthellae)

Question 33

free transportation and food scraps from the crab a. dinoflagellates (zooxanthellae) b. hermit crabs c. damselfishes

Answer 33

b. hermit crabs

Question 34

radial or bilateral symmetry

Answer 34

still debated