Name: 
 

MS_Invertebrates



True/False
Indicate whether the statement is true or false.
 

 1. 

Barnacles are filter feeders.
tf001-1.jpg
 

 2. 

Comb jellies (phylum ctenophore) are named after the eight rows of cilia that help them to swim.
 

 3. 

Barnacles are mollusks and chitons are arthropods.
 

 4. 

Mullusca don’t have hands but they do have a muscular foot.
 

 5. 

A sea anemone is in the hydra form, where as an a moon jelly is the medusa form of a cnidarian.

tf005-1.jpg
 

 6. 

Platyhelminths have a complete digestive tract with mouth and anus, while annelids do not.
 

 7. 

An octopus or cuttlefish can rapidly change the texture and color of its skin using cells called chromatophores.
 

Multiple Choice
Identify the choice that best completes the statement or answers the question.
 

 1. 

Squid have a structure called an ink sac which they use to
a.
maintain homeostasis.
b.
grow.
c.
evade predators.
d.
respire.
 

 2. 

Select the only phylum listed that does not exhibit bilateral symetry
a.
cnidaria
c.
platyelminthes
b.
arthropod
d.
mollusca
 

 3. 

Select the true statement about phylum cnidaria
a.
they have an exoskeleton
c.
they have a digestive track with two openings
b.
most members are parasitic
d.
primative muscles and nerves most likely allowed them to be the first organisms on earth to move
 

 4. 

There are more species of arthropods on the planet than any other.  Which of the following traits is not associated with arthropods success.
a.
jointed appendages
c.
bilateral symetry with body segmentation
b.
stinging cells (nematocysts)
d.
a strong exoskeleton
 

 5. 

Which letter identifies the strucure squid use for rapid propulsion as well as pumping water over its gills?

mc005-1.jpg
a.
A
c.
C
b.
B
d.
D
 

 6. 

A student observed the movement of cirri in three groups of rock barnacles kept at different water temperatures. He recorded the number of cirri beats per minute for one (random) barnacle from each group in six separate trials. All other conditions in the three groups’ environments, such as levels of salinity and sunlight, were kept constant for each group throughout the six trials. The results are shown in the table below.

mc006-1.jpg

The results of this experiment show that
a.
as temperature decreases, cirri activity increases
c.
as temperature increases, cirri activity increases
b.
there is no relationship between temperature and cirri activity.
d.
as temperature increases, cirri activity decreases
 

 7. 

A tentative conclusion that can be drawn from the data in question 7 is that
a.
barnacles show no response to changes in their environment
c.
food is the only factor that affects cirri activity
b.
barnacles are warm-blooded animals
d.
temperature has an effect on the life activities of barnacles
 

 8. 

Echinoderms are agressive predators.  Which of the following is not an adaptation used by echinoderms for feeding
a.
a stomach that can be expelled
c.
tube feet for prying open bivalve shells
b.
pedicellaria (little pincers)
d.
a radula (rasping tongue)
 

 9. 

Horseshoe crab’s blood is a medical miracle, it’s blood is also
a.
red
c.
green
b.
blue
d.
purple
 

 10. 

The role of a sponges spicule like these is...
mc010-1.jpg
a.
reproduction
c.
eating
b.
defense and stucture
d.
camoflague
 

 11. 

An echinoderm called a sea cucumber has the unique ability to eject all of their internal organs from their bodies when they are threatened by a predator, a process known as
a.
nektonic
b.
evisceration.
c.
extraction
d.
echinodermata.
 

 12. 

mc012-1.jpg

This lovely creature is best described as a...
a.
planktonic mollusk
c.
a kelp forest sponge
b.
deep sea echinoderm
d.
a giant clam
 

 13. 

Which of the following is not a true statement about phylum porifera
a.
the have both specialized cells and a body symetry based on a circle
c.
they are stationary animals
b.
water flowws through its body so that they can filter feed
d.
they have glass-like spicules to help give their bodies stucture
 

 14. 

Choose the anatomical feature that is characteristic of Echinoderms such as the sea star.
a.
parapodia
b.
water vascular system
c.
incurrent siphon
d.
muscular foot
 

 15. 

Describe the following correctly:
mc015-1.jpg
a.
swimming nekton, an annelid
c.
swimming plankton, an arthopod
b.
floating plankton, an algae
d.
floating nekton, an echinoderm
 

 16. 

mc016-1.jpg

The picture above is a poisonous cone snail.  Select the organims below that is its closest living relative.
a.
a clam
c.
a christmas tree worm
b.
a crab
d.
a seastar
 

 17. 

Plankton can be found in the greatest numbers in
a.
the middle of the open ocean
c.
the warmest parts of the ocean
b.
coastal areas with upwelling  currents
d.
in the deepest parts of the ocean
 

 18. 

mc018-1.jpg

Organisms that have a radula (toothed tongue) are also likely to have which of the following.
a.
stinging cells
c.
radial symmetry
b.
a muscular foot
d.
tube feet
 

 19. 

mc019-1.jpg
It would surprise many non-marine biologists that this mass of “spaghetti”  is actually a
a.
jellyfish
c.
segmented worm
b.
sea star
d.
arthropod
 

 20. 

mc020-1.jpg

Stomphia is an unusual anemone.  When threatened it frees itself and swims away.  In order to do this, its ancestors had to evolve
a.
stinging cells
c.
a nervous system and simple muscles
b.
a nervous system
d.
tentacles
 

 21. 

mc021-1.jpg

This picture shows us coral polyps.  Pick the best description for what a coral polyps are.
a.
mollusca with feeding tentacles that grab their prey
c.
arthropods that use claws to pick apart food
b.
cnidarians with feeding tentacles that immobilize or kill prey using their nematocysts. 
d.
cnidarians that feed by eviscerating their stomachs and digesting food externally
 

 22. 

mc022-1.jpg

These are the homes of
a.
annelids
c.
crayfish
b.
octopi
d.
sea cucumbers
 

 23. 

mc023-1.jpg
As we worked through the shell sorting activity.  The first shell(s) sorted out was the... (use the picture above if you don’t remember)
a.
the nerites
c.
the cowries
b.
the scallop
d.
the cone shells
 

Matching
 
 
Match the shell to its proper group (you may use answers more than once and you may look at actual shells in the back of the room.)
a.
bivalve
c.
nautalis
b.
gastropod
d.
chiton
 

 1. 

ma001-1.jpg
 

 2. 

ma002-1.jpg
 

 3. 

ma003-1.jpg
 

 4. 

ma004-1.jpg
 

 5. 

ma005-1.jpg
 
 
Match the organism to a distinguishing physical characteristic
a.
a siphon
e.
exoskeleton
b.
spicules
f.
body segmentation with segments called setea
c.
numatocyst
g.
weapon like penis
d.
tube feet
 

 6. 

ma006-1.jpg
 

 7. 

ma007-1.jpg
 

 8. 

ma008-1.jpg
 

 9. 

ma009-1.jpg
 

 10. 

ma010-1.jpg
 

 11. 

ma011-1.jpg
 

 12. 

ma012-1.jpg
 

 13. 

ma013-1.jpg
 
 
Match the organism to their type of symetry (answers may be used more than once.)
a.
no symetry
c.
radial symetry
b.
bilatteral symetry
d.
five part radial symetry
 

 14. 

ma014-1.jpg
 

 15. 

ma015-1.jpg
 

 16. 

ma016-1.jpg
 

 17. 

ma017-1.jpg
 

 18. 

ma018-1.jpg
 

 19. 

ma019-1.jpg
 
 
Match the feeding structure to the correct phylum of invertebrate (phylums may be used more than once.)
a.
porifera
d.
mollusca
b.
arthropoda
e.
cnidarian
c.
echinodermata
 

 20. 

claws, bilateral symetry
 

 21. 

radula, bilateral symetry
 

 22. 

beak, bilateral symetry
 

 23. 

external digestion, five part radial symetry
 

 24. 

collar cells with flagella, no body symetry
 

 25. 

symbiotic relationships with algae, radial symetry
 
 
Match the parts of the crayfish.
grp005-1.jpg
a.
1
d.
8
b.
2
e.
9
c.
5
 

 26. 

swimmerets
 

 27. 

abdominal segments
 

 28. 

cephalothorax
 

 29. 

walking legs
 

 30. 

antenae
 



 
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