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Algae, Sponges and Cnidarians

Total questions: 21

Worksheet time: 7mins

Name
Class
Date
1.

True or False: Are macroalgae plants?

a)

True

b)

False

2.

Check all that apply: Macroalgae is classified into what main groups

a)

Red Algae(Rhodophyta)

b)

Green Algae(Chlorophyta)

c)

Purple Algae

d)

Brown Algae(Phaeophyta)

3.

Which category of macroalgae grows to be the largest?

a)

Chlorophyta

b)

Rhodophyta

c)

Phaeophyta

4.

Which category of algae only has a few marine species?

a)

Rhodophyta

b)

Chlorophyta

c)

Phaeophyta

5.

In sexual reproduction, the gametes are

a)

Diploid

b)

Haploid

6.

Check all that apply: What do macroalgae need to survive?

a)

Nutrients

b)

Darkness

c)

Sunlight

d)

Substrate to anchor to

7.

Check all that apply: Gametes make a clone of itself through

a)

Budding

b)

Fertilization

c)

Zoospores

d)

Fragmentation

8.

True or False: Sponges have true tissues

a)

True

b)

False

9.

How many sponge classes are there

a)

4

b)

5

c)

6

d)

7

10.

What ecological role are sponges?

a)

Primary Producer

b)

Decomposer

c)

Secondary Consumer

d)

Apex Predator

11.

What phylum do sponges belong to?

a)

Porifera

b)

Cnidarian

c)

Mollusca

d)

Echinodermata

12.

True or False: Sponges have a nervous system

a)

True

b)

False

13.

Check all that apply: Sponges eat what food particles suspended in water?

a)

Plankton

b)

Krill

c)

Small chunks of dead organisms

d)

Seaweed

14.

Check all that apply: Spicules are made up of

a)

Silica

b)

Calcium

c)

Flagellum

d)

Specialized cells

15.

The outer tissue layer is the

a)

Endoderm

b)

Ectoderm

c)

Mesoglea

d)

Epidermis

16.

True or False: Cnidarians are strictly aquatic?

a)

True

b)

False

17.

Cnidarians do not have

a)

True muscles

b)

True nerves

c)

Nerve net

d)

Muscle fibers

18.

The surface without a mouth or tentacle is known as

a)

The oral surface

b)

The aboral surface

19.

What cells are located on the tentacle that help capture food?

a)

Gastric pouches

b)

Cnidocytes

c)

Nematocysts

d)

None of the above

20.

Which is a true jellyfish?

a)

Cubozoans

b)

Hydrozoans

c)

Anthozoans

d)

Scyphozoans

21.

Which class of hydrozoans have the most toxic venom

a)

Cubozoans

b)

Anthozoans

c)

Hydrozoans

d)

Scyphozoans