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Cnidarians

Total questions: 17

Worksheet time: 11mins

Name
Class
Date
1.

What class does the Portuguese Man O' War belong to?

a)

Hydrozoa

b)

Anthozoa

c)

Scyphozoa

d)

Cubozoa

2.

Which of these is NOT a member of the phylum Cnidaria

a)

Portuguese Man O' War

b)

Moon Jelly

c)

Sea Nettle

d)

Comb Jelly

3.

Instead of a brain, most cnidarians have a...

a)

spinal chord

b)

nerve net

c)

sensory chain

d)

neural branch

4.

The stinging barb located in the tentacles of cnidarians are called

a)

Cnidaria

b)

Nematocyst

c)

Mesoglea

d)

Epidermis

5.

During which stage of a jellyfishes life cycle is it most like an adult sea anemone

a)

Planula larvae

b)

Medusa

c)

Polyp

d)

Embryo

6.

Which class of cnidarians spends practically all of its life in the benthic zone?

a)

Ctenophore

b)

Scyphozoa

c)

Cubozoa

d)

Anthozoa

7.

Which other cnidarian is closet related to coral?

a)

Jellyfish

b)

Hydroids

c)

Sea Anemone

d)

Comb jellies

8.

Which cnidarians do we not normally see in symbiotic relationships

a)

Coral

b)

Sea anemone

c)

box jellies

9.

Name this animal

a)

Comb Jelly

b)

Sea Nettle

c)

Moon Jelly

d)

Coral Polyp

10.

Name this cnidarian

a)

Moon Jellyfish

b)

Lions mane jellyfish

c)

Box jellyfish

d)

Comb jelly

11.

True or False: Hydrozoans live in colonies where each individual does the exact same job

a)

True

b)

False

12.

What are the polyps at the TOP of the Portuguese man o war for?

a)

Reproduction

b)

Stinging & catching food

c)

Digestion

d)

Floatation

13.

Name this cnidarian

a)

Sea anemone

b)

Brain Coral

c)

Staghorn Coral

d)

Hydroid

14.

Corals and jellyfish are classified together mainly because they

a)

share the same habitat

b)

have stinging tentacles

c)

are tropical

d)

are planktonic

15.

Cnidarian tentacles grow in a ring around their mouths, what kind of symmetry is that?

(seen in starfish too)

a)

Radial

b)

Bilateral

c)

Asymmetry

d)

Helix

16.

What is the gel-like substance that makes up the majority of the jellyfish body?

a)

Mesoglea

b)

Gastrodermis

c)

Epidermis

d)

Nematocyst

17.

Name this cnidarian

a)

Moon jelly

b)

Comb jelly

c)

Sea Nettle

d)

Box Jelly