Biology (Raven), 9th Edition

Chapter 33: Noncoelomate Invertebrates

Post-Test

1
Sponges are filter feeders. The cells that draw water into the sponge are called:
A)archeocytes.
B)amoebocytes.
C)choanocytes.
D)choanoflagellates.
E)cnidocytes.
2
Which of the following is a characteristic of sponges?
A)All have radial symmetry
B)Sexual reproduction
C)Tissues
D)Organs
E)Adult mobility
3
A major evolutionary innovation seen in Cnidaria, compared with sponges, is:
A)the evolution of the nematocysts.
B)some can undergo either sexual or asexual reproduction.
C)some members secrete calcareous skeletons.
D)some show bioluminescence.
E)extracellular digestion of food.
4
Cnidarian digestion is
A)internal and extracellular.
B)internal and intracellular.
C)external and intracellular.
D)Nonexistent.
E)Similar to sponge digestion.
5
Which of the following is not a characteristic of cnidarians?
A)Tissues
B)Symmetry
C)Sexual reproduction
D)Asexual reproduction
E)Organs
6
In some species of nematode the adults consist of a fixed number of cells. This is known as:
A)eutrophy.
B)eutely.
C)homosis.
D)constancy.
E)numeracy.
7
A representative of the acoelomates would be
A)earthworms.
B)roundworms.
C)snails.
D)flatworms.
E)squids.
8
Ecdysozoans include
A)nematodes.
B)mollusks.
C)flatworms.
D)chordates.
E)echinoderms.
9
The traditional classification of the animals divides the bilaterally symmetrical animals into three branches based on:
A)multicellularity.
B)mode of nutrition.
C)type of embryological cell division.
D)type of body cavity.
E)all of the above
10
Sponge cells differ from those of other animals because:
A)they have unique capsules called nematocysts.
B)they lack a cell wall.
C)they are able to differentiate into other cell types and to dedifferentiate.
D)the cells can exist in a solitary state.
E)they have unique capsules called nematocysts and they lack a cell wall.
11
Cnidaria (jellyfish, corals, etc.) differ from other organisms because:
A)they have unique, specialized cells called cnidocytes.
B)some can undergo either sexual or asexual reproduction.
C)some members secrete calcareous skeletons.
D)some show bioluminescence.
E)all of the above
12
Which of the following have an anal pore?
A)ctenophorans
B)flukes
C)tapeworms
D)free-living flatworms
E)cnidarians
13
The free-living flatworms (Turbellaria) are small (a few mms in length), and have flat, thin bodies. This is because:
A)they are limited in size because they lack a coelom.
B)of the habitat in which they occur.
C)gas exchange must be by diffusion as they lack a circulatory system.
D)they are limited in size because they lack a coelom and gas exchange must be by diffusion as they lack a circulatory system.
E)none of the above
14
The nervous system of most flatworms can correctly be described as
A)a brain.
B)longitudinal nerve chords.
C)a central nerve chord.
D)a nerve ring.
E)lacking.
15
Which of the following phyla was discovered most recently?
A)Cycliophora
B)Cnidaria
C)Porifera
D)Nematoda
E)Platyhelminthes
Glencoe Online Learning CenterScience HomeProduct InfoSite MapContact Us

The McGraw-Hill CompaniesGlencoe

Please read our Terms of Use and Privacy Notice before you explore our Web site. To report a technical problem with this Web site, please contact the Web Producer.