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Cnidarians

Total questions: 21

Worksheet time: 13mins

Name
Class
Date
1.

Jellyfish have what type of body structure

a)

Medusa

b)

Polyp

c)

Hydra

d)

Branched

2.

Sea anemones have what type of body structure?

a)

Medusa

b)

Polyp

c)

Down

d)

Sessile

3.

T/F: Cnidarians have eyes that function just like ours do.

a)

True

b)

False

4.

What is the name of the algae that inhabit the coral?

a)

green algae

b)

euglenoids

c)

zooxanthellae

5.

Hydra reproduce asexually by

a)

budding

b)

nematocysts

c)

gland cells

d)

gametes

6.

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

7.

Which other cnidarian is closet related to coral?

a)

Jellyfish

b)

Hydroids

c)

Sea Anemone

d)

Comb jellies

8.

Name this cnidarian

a)

Sea anemone

b)

Brain Coral

c)

Staghorn Coral

d)

Hydroid

9.

Corals and jellyfish are classified together mainly because they

a)

share the same habitat

b)

have stinging tentacles

c)

are tropical

d)

are planktonic

10.

Jellyfish have ______ symmetry

a)

radial

b)

assymetrical

c)

bilateral

d)

quad

11.

Cnidaria means ____ cells.

a)

shelter

b)

stinging

c)

polyp

d)

medussa

12.

Cnidarians with the _____ body form, have tentacles that point up.

a)

hydra

b)

medusa

c)

radial

d)

polyp

13.

Which examples are cnidarians

a)

jellyfish

b)

sponges

c)

earthworms

d)

starfish

14.

Giant Jellyfish begin life as a

a)

polyp

b)

grain of rice

c)

anemone

d)

jellyfish

15.

What does the word poisonous mean?

a)

produces poison

b)

very nice

c)

has a great flavor

d)

is invisible

16.

What is an invertebrate?

a)

An animal that has a shell

b)

An animal that lives in the water

c)

An animal with no backbone

d)

An animal that can fly

17.

Sponges use pores to absorb nutrients and oxygen.

a)

true

b)

false

18.
What do jellyfish have that sting to help them catch food?
a)
eyes
b)
tentacles
c)
mouths
d)
backbones
19.
This picture is an example of which group of invertebrates?
a)
Segmented worms
b)
Fish
c)
Sponges
d)
Arthropods
20.
I have a cavity with one opening.  I am coral.  In what phylum am I?
a)
Mollusk
b)
Arthropod
c)
Echinoderm
d)
Cnidarian
21.

Humans are invertebrates.

a)

True

b)

False