Name: 
 

CH. 10 Sponges, Cnidarians and Worms



Modified True/False
Indicate whether the sentence or statement is true or false.  If false, change the identified word or phrase to make the sentence or statement true.
 

1. 

Animals are autotrophs. _________________________

 

2. 

About 95 percent of all animal species are invertebrates. _________________________

 

3. 

Teeth with broad, flat surfaces are usually found in herbivores. _________________________

 

4. 

The body parts of animals with radial symmetry are arranged in a circle. _________________________

 

5. 

Water enters a sponge through an opening called an osculum. _________________________

 

6. 

Cnidarians pull prey to their mouths with their stinging cells. _________________________

 

7. 

The cnidarian body plan that is shaped like a bowl is called a polyp. _________________________

 

8. 

Coral reefs are built by cnidarians. _________________________

 

9. 

Tapeworms belong to the roundworm phylum. _________________________

 

10. 

A type of worm with a segmented body is an earthworm. _________________________

 

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

11. 

Which of the following is a characteristic shared by all animals?
a.
Their bodies have many cells.
b.
They eat autotrophs.
c.
They reproduce asexually.
d.
They have skeletons.
 

12. 

What is the term for a group of tissues that work together to perform a specific, complex job?
a.
organism
b.
organ
c.
autotroph
d.
herbivore
 

13. 

The process by which a new organism forms from the joining of an egg cell and a sperm cell is called
a.
asexual reproduction.
b.
sexual reproduction.
c.
regeneration.
d.
budding.
 

14. 

An animal that has a backbone is called a(n)
a.
cnidarian.
b.
predator.
c.
vertebrate.
d.
invertebrate.
 

15. 

Energy for an animal's body activities comes from
a.
air.
b.
water.
c.
food.
d.
growth.
 

16. 

What is the term for an animal that hunts and kills other animals for food?
a.
vertebrate
b.
carnivore
c.
predator
d.
herbivore
 

17. 

Which of the following is an adaptation for escaping a predator?
a.
eating only plants
b.
having radial symmetry
c.
being asymmetrical
d.
having flesh that tastes bitter
 

18. 

Which of these animals has radial symmetry?
a.
a sea anemone
b.
a butterfly
c.
a rabbit
d.
a snail
 

19. 

An animal has bilateral symmetry if
a.
no lines can be drawn to divide the animal into halves that are mirror images.
b.
many lines can be drawn to divide the animal into halves that are mirror images.
c.
one line can be drawn to divide the animal into halves that are mirror images.
d.
any line through the center of the animal divides it into halves that are mirror images.
 

20. 

Which of the following is a characteristic of animals with radial symmetry?
a.
They have no head or tail.
b.
They must move quickly to catch prey.
c.
They move faster on land than in water.
d.
They have sense organs at the front of their bodies.
 

21. 

How does a sponge gather its food?
a.
by trapping food in its pores
b.
by killing food with its spikes
c.
by trapping food in its collar cells
d.
by absorbing food through its osculum
 

22. 

Sponges belong to the phylum
a.
Platyhelminthes.
b.
Porifera.
c.
Cnidaria.
d.
Invertebrata.
 

23. 

Which of these is a function of spikes in a sponge?
a.
to support the sponge's body
b.
to help the sponge reproduce
c.
to digest and distribute food
d.
to eliminate wastes from the sponge
 

24. 

How do sponges reproduce sexually?
a.
Sperm from a sponge fertilize eggs in the same sponge.
b.
Water carries sperm from one sponge to eggs in another sponge.
c.
Water carries eggs from one sponge to sperm in another sponge.
d.
Eggs are fertilized by sperm within the sponge's collar cells.
 

25. 

Which of the following describes the feeding behavior of cnidarians?
a.
They are herbivores.
b.
They are omnivores.
c.
They are carnivores.
d.
They are autotrophs.
 

26. 

The bodies of cnidarians have
a.
no symmetry.
b.
radial symmetry.
c.
bilateral symmetry.
d.
both radial and bilateral symmetry.
 

27. 

How does a cnidarian capture prey?
a.
by filtering prey from water
b.
by paralyzing prey with venom
c.
by pulling prey inside its osculum
d.
by attaching itself to prey with suction
 

28. 

Which of these is a vase-shaped cnidarian?
a.
a medusa
b.
a polyp
c.
a larva
d.
a jellyfish
 

29. 

How are coral reefs created?
a.
from the skeletons of dead corals
b.
from the expelled waste of corals
c.
from the skeletons of prey caught by corals
d.
from the jelly produced by living corals
 

30. 

At the beginning of its life, a coral
a.
has the medusa body plan.
b.
is a free-swimming larva.
c.
burrows into the mud on the ocean floor.
d.
feeds only on sponges.
 

31. 

Which of the following best describes the kinds of animals found in a coral reef?
a.
There are only invertebrates.
b.
Many kinds of animals live there.
c.
Only corals live there.
d.
It is home to animals adapted to live in cold water.
 

32. 

Which of these is a phylum of worms?
a.
Porifera
b.
Annelida
c.
Mollusca
d.
Invertebrata
 

33. 

Which of these is NOT a major kind of worm?
a.
flatworms
b.
roundworms
c.
silkworms
d.
segmented worms
 

34. 

Which of the following is a flatworm?
a.
a leech
b.
an earthworm
c.
a hookworm
d.
a planarian
 

35. 

Which of these characteristics is shared by all worms?
a.
They have a digestive system that is a tube.
b.
They are parasites.
c.
They live in soil.
d.
They have a brain.
 

36. 

The ability of an organism to regrow lost parts is called
a.
regeneration.
b.
budding.
c.
parasitism.
d.
autotrophism.
 

37. 

Organisms that grow on or in other organisms are called
a.
parasites.
b.
hosts.
c.
prey.
d.
scavengers.
 

38. 

Which of the following describes a roundworm's digestive system?
a.
Food enters the body and wastes leave the body through the same opening.
b.
Food enters through a feeding tube.
c.
Food travels through the digestive system in two directions.
d.
The digestive system is like a tube that is open at both ends.
 

39. 

A segmented worm's circulatory system
a.
is closed.
b.
is open.
c.
is exactly the same in each segment.
d.
has a pumping organ in each segment.
 

40. 

What do earthworms do to soil?
a.
They damage it by tunneling.
b.
They add moisture to it.
c.
They poison it with their wastes.
d.
They make it more fertile with their wastes.
 



 
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