Download Biology Ch 27 Learning Guide Name: Period: ______ MULTIPLE

Biology Ch 27 Learning Guide
Name: _______________________ Period: __________
MULTIPLE CHOICE
1. Asexual reproduction in free-living flatworms takes place by the process known as
a. budding
b. fission
c. hermaphroditism
2. An intermediate host is an organism in which a parasite
a. reproduces asexually
b. reproduces sexually
c. clogs blood vessels
3. Which of the following is a parasitic roundworm?
a. trichinella
b. a turbellarian
c. a tapeworm
4. Some flatworms have clusters of nerve cells that control the nervous system. Each cluster is
called a(an)
a. ganglion
b. eyespot
c. flame cell
5. Free-living flatworms, most of which live in marine environments or fresh water, are
a. flukes
b. turbellarians
c. tapeworms
6. Roundworms have a digestive system
a. With a true coelom
b. with one opening
c. with two openings
7. To move, roundworms use their
a. proglottids
b. pharynx
c. hydrostatic skeleton
8. In earthworms, food is ground into small pieces in the
a. crop
b. gizzard
c. pharynx
9. Annelids have what kind of circulatory system?
a. closed
b. open
c. proglottids
10. The body of an annelid has
a. a backbone
b. segments
c. external shell
11. The bristlelike structures on some annelids’ bodies are called
a. setae
b. ganglia
c. suckers
12. Earthworm tunnels provide passageways for
a. leeches
b. planarians
c. plant roots and water
13. The thin layer of tissue that covers a mollusk’s body is called the
a. mantle
b. foot
c. visceral mass
14. The tubelike structure through which water enters and leaves a mollusk’s body is the
a. coelom
b. siphon
c. tube foot
15. The most active mollusks are the
a. gastropods
b. cephalopods
c. bivalves
SHORT ANSWER
16. A _________________________ is an individual organism that has both male and female
reproductive organs.
17. Many free-living worms have ________________________, that detect changes in light.
18. As many as 25% of the world’s population is infected with _____________________.
19. Annelids that live in water breathe through _____________.
20. The ____________________ is the fluid filled space that lies between the digestive tract and the
body wall.
21.
22.
23.
24.
TRUE OR FALSE
True or False Flatworms are acoloemates, meaning they don’t have a true body cavity.
True or Flukes are parasitic flatworms that infect internal organs of their host.
True or False Hookworms can not be passed by exposure to fecal matter between dogs, cats and
humans.
True or False Aquatic mollusks do not have gills inside their mantle cavity
MATCHING
25.
26.
27.
28.
29.
30.
____ Coleom
____ Pharynx
____ Crop
____ Bilateral symmetry
____ Pseudocoloem
____ Muscular foot
a. a muscular tube that extends out of the mouth to move food
into the digestive cavity
b. where food is stored
c. a partial body cavity that allows them to have a mouth and
anus
d. space between your outer layer and your inner layer. This
contains your organs.
e. takes many forms, including structures for crawling, burrowing
and capturing food.
f. two sides that can be identified as left and right