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Cnidarian Quiz

Total questions: 20

Worksheet time: 10mins

Name
Class
Date
1.

What is the free-swimming form of Cnidarians?

a)

polyp

b)

medusa

c)

planula

2.

What type of symmetry do Cnidarians have?

a)

asymmetrical

b)

bilateral

c)

radial

d)

medial

3.

Sea Anemones and Corals belong to the Class ______________

a)

Anthozoa

b)

Cubozoa

c)

Hydrozoa

d)

Scyphozoa

4.

What are the stinging cells inside the cnidocyte that inject paralyzing toxins into their prey?

a)

pinacocytes

b)

lysomatocyts

c)

choanocytes

d)

nematocysts

5.

Which body form is represented by this diagram?

a)

Mesoglea

b)

Medusa

c)

Porifera

d)

Choanocyte

6.
What is this organism? What Class does it belong to?
a)
jellyfish:scyphozoa
b)
Portuguese man-of-war:hydrozoa
c)
hydra:hydrozoa
d)
coral:anthozoa
7.

"True Jellies" belong to the Class _______.

a)

Staurozoa

b)

Anthozoa

c)

Cubozoa

d)

Scyphozoa

8.

The ______________ allows Cnidarians to respond to stimuli in their environment.

a)

nerve net

b)

tentacles

c)

spicules

d)

nematocysts

9.

Which Class does this organism belong in?

a)

Class Scyphozoa

b)

Class Anthozoa

c)

Class Hydrozoa

d)

Class Cubozoa

10.

Which of these is NOT a Cnidarian Class?

a)

Anthozoa

b)

Monozoa

c)

Scyphozoa

d)

Hydrozoa

11.
Polyps are ______, while medusa are ______. 
a)
sessile, motile
b)
motile, sessile
c)
both motile and sessile, just motile
12.

When a jellyfish attacks its prey, it using stinging cells called ________________.

a)

Colloblasts

b)

Bludgers

c)

Cnidocytes

d)

Blastoscytes

13.
All Cnidarians have _____, but no _____.
a)
stinging cells, tissue cells
b)
organs, tissue
c)
tissues, organs
d)
tissue, stinging cells
14.
What body form do members of Class Anthozoa have?
a)
medusa
b)
polyp
c)
medusa and polyp
15.

True or False: Cnidarians do not have a central nervous system.

a)

True

b)

False

16.

How do cnidarians reproduce?

a)

only sexually

b)

only asexually

c)

both sexually and asexually

d)

genetically reproduced in labs

17.

True or False: All cnidarians are sessile.

a)

True

b)

False

18.

What body type does this cnidarian possess?

a)

Polyp

b)

Medusa

19.

Box Jellyfish belong to the Class ______________

a)

Anthozoa

b)

Cubozoa

c)

Hydrozoa

d)

Scyphozoa

20.

Which Class does this organism belong in ?

a)

Anthozoa

b)

Scyphozoa

c)

Cubozoa

d)

Hydrozoa