Cnidarians & Ctenophores

1.

Multiple Choice

30 sec

1 pt

Phylum Ctenophora have _______________ made of ___________ for locomotion.

tentacles ; colloblasts

comb rows ; cilia

tentacles ; cilia

comb rows ; colloblasts

2.

Multiple Choice

30 sec

1 pt

When a Cnidarian catches prey, it uses stinging cells called...

Colloblasts

Stingers

Cnidocytes

Blastoscytes

3.

Multiple Choice

30 sec

1 pt

How do Cnidarians get their prey into their mouths?

contractile cells in gastrovascular cavity

nematocysts pull prey into mouth

contractile cells in feeding arms pull prey into mouth

cnidocytes digest prey outside of stomach

4.

Multiple Choice

30 sec

1 pt

Which of the following is a correct description of the polyp body form?

It's mostly sessile and the tentacles point downward.

It's mostly sessile and the tentacles point upward.

It's mostly mobile and the tentacles point downward.

It's mostly mobile and the tentacles point upward.

5.

Multiple Choice

30 sec

1 pt

Which group of Cnidarians have a symbiosis with algae?

anemones

soft corals

jellyfish

comb jellies

stony corals

6.

Multiple Choice

30 sec

1 pt

The _____ enables cnidarians to respond to stimuli in their environment and send electrical impulses to the muscles.

nerve net

brain

peripheral nerves

nerve cord

7.

Multiple Choice

30 sec

1 pt

Which body form is represented by this diagram?

Mesoglea

Medusa

Polyp

Polyp changing into medusa

8.

Multiple Choice

30 sec

1 pt

What is a defining characteristic between a cnidarian and a ctenophore?

Ctenophores are freshwater and cnidarians are marine

cnidarians have stinging cells and ctenophores don't

ctenophores have stinging cells and cnidarians don't

ctenophore is another name for cnidarian

9.

Multiple Choice

30 sec

1 pt

Which group of jellies have a sting that can kill a human?

Hydrozoa

Anthozoa

Cubozoa

Scyphozoa

10.

Multiple Choice

30 sec

1 pt

How many tissue layers do Cnidarians feature?

1 - monoblastic

2 - diploblastic

3 - triploblastic

depends on the species

11.

Drag and Drop

1 min

1 pt

(a) are the stinging cells in cnidarians, and (b) are the harpoon-like structures that shoot out of the cells.

cnidocytes

nematocysts

colloblasts

spicules

12.

Multiple Choice

30 sec

1 pt

When a comb jelly catches its prey, it uses sticky cells called...

Colloblasts

Nematocysts

Cnidocytes

Blastoscytes

13.

Multiple Choice

30 sec

1 pt

Parts F & G are the _________ & ________ and make up the _______________.

radial & circular canals ; hydrostatic skeleton

mouth & pharynx ; gastrovascular cavity

radial & circular canals ; nervous system

oral & feeding arms ; tentacles

14.

Fill in the Blank

1 min

1 pt

If you are stung by a jellyfish, what are the TWO treatments you can use to relieve the sting?

15.

Multiple Select

30 sec

1 pt

Which of these are typically colonial?

stony corals

jellyfish

soft corals

anemones

siphonophores

16.

Multiple Choice

30 sec

1 pt

Which of these is part of class Scyphozoa?

17.

Multiple Select

30 sec

1 pt

Select all of the members of class Hydrozoa:

18.

Multiple Choice

30 sec

1 pt

Which one is the box jellyfish (class Cubozoa)?

19.

Multiple Select

30 sec

1 pt

Which of these are members of class Anthozoa?

20.

Multiple Select

45 sec

1 pt

Which of these is in phylum Ctenophora?

21.

Multiple Choice

30 sec

1 pt

Which one is the stalked jellyfish (class Staurozoa)?

22.

Multiple Choice

30 sec

1 pt

Letters A, C, and E all represent what type of tissue?

skeletal

gastrodermis

muscle

nervous

23.

Multiple Choice

30 sec

1 pt

Structure E is the __________ and it functions in _______________.

rhopalium ; sensing light

rhopalium ; releasing gametes

gonads ; releasing gametes

radial canal ; detecting prey

24.

Multiple Choice

30 sec

1 pt

Cnidarians can contain both male and female gonads, a condition called ____________________; OR they can be separate sexes, a condition called ______________.

monoecious ; dioecious

dioecious ; monoecious

25.

Multiple Choice

30 sec

1 pt

Structure B is the

stomach

gonads

pharynx

basal disk

26.

Multiple Choice

30 sec

1 pt

Which type(s) of anthozoans produce a calcium carbonate structure?

Sea Anemones

Hard / stony corals

Soft Corals

Zoanthids

All of them

27.

Multiple Choice

30 sec

1 pt

Which type of Anthozoan produce structures called sclerites for structure & support?

Sea Anemones

Zoanthids

Stony Corals

Soft Corals

All of them

28.

Multiple Choice

30 sec

1 pt

Class Myxozoa are parasitic cnidarians. What type of animals do they affect?

commercial fishes like trout & salmon

sharks

other cnidarians

crabs & lobsters

marine mammals

29.

Match

1 min

1 pt

Match the following

Stony coral

Class Nuda

Soft coral

Class Tentaculata

Class Staurozoa

30.

Multiple Select

45 sec

1 pt

Select all of the characteristics that apply to Hydras:

Found in freshwater

Hydras don't age - most of their cells are stem cells

Hydras never die

Found in ocean / marine habitats

they can be in polyp or medusa form

31.

Match

1 min

1 pt

Match the following Cnidarian classes to examples:

Stalked jellies

Class Staurozoa

Box jellies, sea wasps

Class Cubozoa

Corals & anemones

Class Hydrozoa

Siphonophores, hydras, crystal jellies

Class Anthozoa

"True jellies"

Class Scyphozoa

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