Phylum Cnidaria & Ctenophora

1.

Multiple Choice

30 sec

1 pt

What is the name of the jelly matrix of a Cnidarian?

epidermis

calyx

mesoglea

epiglea

2.

Multiple Choice

30 sec

1 pt

This picture is which of the two main body forms of a Cnidarian?

polyp

zooanthellae

larvae

medusa

3.

Multiple Choice

30 sec

1 pt

The Cnidarian nervous system is very simple. Instead of a developed brain with a complex nervous system they have a:

nerve net

nerve circle

brain net

nerve polyp

4.

Multiple Choice

30 sec

1 pt

Organisms that produce both male and female gametes are called:

trioecious

dioecious

monoecious

bioecious

5.

Multiple Choice

30 sec

1 pt

What is the name of the stinging cells from which this phyla gets its name?

cnidogametes

cnidocytes

cnidogemmules

cnidoecious

6.

Multiple Choice

30 sec

1 pt

This picture is which of the two main body forms of a Cnidarian?

polyp

gemmule

medusa

larvae

7.

Multiple Choice

30 sec

1 pt

Which Cnidarian class contains the box jellyfish?

Anthozoa

Cubozoa

Scyphozoa

Hydrozoa

8.

Multiple Choice

30 sec

1 pt

What is the name of Cnidarian larva?

pupa

pupae

planula

plastron

9.

Multiple Choice

30 sec

1 pt

What Cnidarian class contains true corals, sea anemones, and sea pens?

Anthozoa

Cubozoa

Hydrozoa

Scyphozoa

10.

Multiple Choice

30 sec

1 pt

What is the most abundant of the freshwater Cnidarians?

box jellyfish

hydra

coral

anthozoa

11.

Multiple Choice

30 sec

1 pt

What has a mutualistic relationship with coral and lives within its tissues?

small fish

larvae

hydra

zooanthellae

12.

Multiple Choice

30 sec

1 pt

Which Cnidarians have the most economic importance to humans?

sea anemones

jellyfish

reef-building corals

sea pens

13.

Multiple Choice

30 sec

1 pt

Which class of Cnidarians contains Hydra, and Portuguese Man-of-War?

Hydrozoa

Anthozoa

Cubozoa

Scyphozoa

14.

Multiple Choice

30 sec

1 pt

Cnidarians have what type of gastrovascular cavity, or coelenteron?

closed gut

complex gut

formed gut

blind gut

15.

Multiple Choice

30 sec

1 pt

Cnidarians are most abundant in what type of environment?

warm, polar, deep marine environments

warm, tropical, shallow marine environments

cold, polar, shallow marine environments

cold, tropical, deep freshwater environments

16.

Multiple Choice

30 sec

1 pt

Through what process does a polyp produce medusae?

fission

budding

strobilation

zooid

17.

Multiple Choice

30 sec

1 pt

What is the name of the organelle of Cnidarians that contains a tiny, coiled, tubular filament?

nematocyst

nematoblast

cnidariacyst

cnidariablast

18.

Multiple Choice

30 sec

1 pt

What class of Cnidarians contains the true jellyfish?

Cubozoa

Anthozoa

Hydrozoa

Scyphozoa

19.

Multiple Choice

30 sec

1 pt

The skeleton, and the calyx, of corals is made out of what substance?

silica

calcium carbonate

silica carbonate

phosphorous

20.

Multiple Choice

30 sec

1 pt

What phylum do comb jellies belong in?

Cnidaria

Porifera

Chordata

Ctenophora

21.

Multiple Choice

30 sec

1 pt

Which pylum: stinging cells, many have zoozanthellae living symbiotically

Cnidaria

Echinodermata

Chordata

Mollusca

22.

Multiple Choice

30 sec

1 pt

When light hits a jellyfish, it responds to the stimuli using its _______________.

Brain

Skin Cells

Epidermis

Nerve Net

23.

Multiple Choice

30 sec

1 pt

Organisms in Phylum Cnidaria and Phylum Ctenophora have what kind of symmetry?

Asymmetry

Bilateral

Radial

Colateral

24.

Multiple Choice

30 sec

1 pt

What trait gives jellies in the Phylum Ctenophora their common name?

Box shape

Combs

Tentacles

Polyps

25.

Multiple Choice

30 sec

1 pt

What kingdom do jellyfish belong to?

Cnidaria

Animalia

Scyphozoa

Porifera

26.

Multiple Choice

30 sec

1 pt

Which Cnidarian class is known for containing the most venomous animal on Earth?

Cubozoa

Scyphozoa

Anthozoa

Hydrozoa

27.

Multiple Choice

30 sec

1 pt

Cnidarians have two body layers: epidermis and ________________.

Vascodermis

Gastrodermis

Microdermis

Innerdermis

28.

Multiple Choice

30 sec

1 pt

Cnidarians have a trait called dimorphism. This means that....

They can change size whenever they are being chased.

They camouflage to blend in with various organisms.

They have three body forms.

They have two body forms.

29.

Multiple Choice

30 sec

1 pt

Which of the following is a reason that coral reefs populations are dying?

Pollution

Human Activity

Global Warming

All of the Above

30.

Multiple Choice

30 sec

1 pt

After a cnidarian has stung it's prey, it uses it's tentacles to pull the food into the hollow space inside of it's body. This space is called the __________________.

Mesohyl

Mesoderm

Gastrovascular Cavity

Coelovascular Cavity

31.

Multiple Choice

30 sec

1 pt

When corals become stressed due to poor environmental conditions, they expel the colorful xoozanthellae that live on their surface, causing the corals to appear white. This is called...

Coral Reversion

Coral Bleaching

Coral Basking

Coral Variation

32.

Multiple Choice

30 sec

1 pt

One reason that coral reefs are so important, is that they provide a home for many other organisms. Some of the species that live on coral reefs can't be found anywhere else in the world. This means they are ___________ to coral reefs.

Endemic

Epistemic

Evident

Exothermic

33.

Multiple Choice

30 sec

1 pt

Polyps are ______, while medusa are ______.

sessile, motile

motile, sessile

both motile and sessile, just motile

34.

Multiple Choice

30 sec

1 pt

Instead of ctenophora having stinging cells, they have sticky cells called

cnidoblasts

colloblasts

nematocysts

stickacytes

35.

Multiple Choice

30 sec

1 pt

What is wrong with this coral?

It hasn't been to sunseekers in over a month

Warming of water made it bleach

Coral mining caused it to sufficate

The loss of fish caused it to die

36.

Multiple Choice

30 sec

1 pt

What is this organism?

jellyfish

Portuguese man-of-war

hydra

coral

37.

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

38.

Multiple Choice

30 sec

1 pt

How do jellyfish move around?

They beat fused cilia on their bodies like oars on a ship

pushing off with their tentacles

shooting air out of their mouths

through rhythmic contractions of muscles in their bells

39.

Multiple Choice

30 sec

1 pt

A colonial cnidarian is...

coral

comb jellies

jellyfish

sea anemones

40.

Multiple Choice

30 sec

1 pt

Which part of a cnidarian's body is waste dispelled from?

the gastrodermis

the tentacles

the mesoglea

the gastrovascular cavity

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