Deck 23: Animal Diversity I: Invertebrates

Question 1

A cnidarian, which is radially symmetrical, has ________ germ layer(s).

A)no
B)one
C)two
D)three
E)four

Answer 1

C

Question 2

Damage to the embryonic ectoderm would show up as damage to which adult body tissues?

A)muscles
B)nervous tissue
C)skeletal tissue
D)circulatory tissue
E)body cavity linings

Answer 2

B

Question 3

The common ancestor of sponges and other animals was probably:

A)unicellular.
B)multicellular without tissues.
C)multicellular with tissues but without organ systems.
D)multicellular with tissues and a few organ systems.
E)multicellular with tissues and many organ systems.

Answer 3

B

Question 4

Anemones have no:

A)endoderm.
B)mesoderm.
C)ectoderm.

Question 5

In the animal kingdom, cephalization is:

A)development of a body that has paired structures forming a side-to-side mirror image.
B)concentration of sensory structures in the head.
C)the ability to respond rapidly to external stimuli.
D)evolutionary development of a netlike system of veins.
E)development of eyes at the anterior end of the organism.

Question 6

How many tissue layers are in the embryos of sponges?

A)none
B)one
C)two
D)three
E)four

Question 7

The major difference between protostomes and deuterostomes is:

A)the presence or absence of a coelom.
B)the way the body cavity forms.
C)the presence or absence of cephalization.
D)the type of body symmetry.
E)the presence or absence of tissues.

Question 8

Which of the following animal phyla is distinguished by a lack of tissues?

A)echinoderms
B)flatworms
C)annelids
D)roundworms
E)sponges

Question 9

A ________ is an organism whose body cavity forms between the body wall and the digestive system.

A)sponge
B)protostome
C)hermaphrodite
D)deuterostome
E)nematode

Question 10

An arthropod embryo has ________ germ layer(s).

A)no
B)one
C)two
D)three
E)four

Question 11

Which of the following characteristics is often associated with animals that are radially symmetrical?

A)mobility
B)gastrovascular cavity
C)sessile or otherwise nonmobile
D)mesoderm
E)cephalization

Question 12

Which of the following characteristics is associated with all animals that are bilaterally symmetrical at some point in their life cycle?

A)lack of organs
B)gastrovascular cavity
C)coelom
D)mesoderm
E)cephalization

Question 13

Organisms that are radially symmetrical have ________ embryonic germ layers.

A)two
B)three
C)four
D)five
E)six

Question 14

All animals with tissues have:

A)symmetrical bodies.
B)bilateral symmetry.
C)radial symmetry.
D)two germ layers.
E)three germ layers.

Question 15

The only animals that lack tissues are:

A)sponges.
B)chordates.
C)chytrids.
D)cnidarians.
E)nematodes.

Question 16

A multicellular organism that lacks cell walls and obtains energy by eating other organisms is a(n):

A)fungus.
B)plant.
C)chytrid.
D)animal.
E)alga.

Question 17

One trend in the evolution of animals is the increase in the number of tissue (germ)layers during embryonic development. Flatworms and more complex animals have ________ layers.

A)two
B)three
C)four
D)five
E)six

Question 18

The skin and nervous tissues develop from which germ layer?

A)ectoderm
B)endoderm
C)mesoderm
D)mesoglea
E)protoplasm

Question 19

Between the organs and the body wall, complex animals have a body cavity called a:

A)cnidarian.
B)mesoderm.
C)mesoglea.
D)coelom.
E)thorax.

Question 20

Which germ layer gives rise to the muscle layer of the uterus?

A)ectoderm
B)mesoderm
C)endoderm

Question 21

What causes schistosomiasis, a devastating disease that affects about 200 million people in tropical regions?

A)nematodes
B)parasitic flatworms called blood flukes
C)echinoderms
D)Trichinella
E)amoebas

Question 22

Giant squids are classified as:

A)arthropods.
B)mollusks.
C)echinoderms.
D)chordates.
E)platyhelminthes.

Question 23

Which cnidarian is the basis of an undersea habitat?

A)sea cucumber
B)hydra
C)anemone
D)jellyfish
E)coral

Question 24

The simplest multicellular animals that have only a few different cell types are:

A)anemones.
B)sponges.
C)jellyfish.
D)flatworms.
E)sea squirts.

Question 25

Insects are:

A)annelids.
B)arthropods.
C)mollusks.
D)beetles.
E)arachnids.

Question 26

Which of these groups is characterized by having a true coelom?

A)sponges
B)cnidarians
C)arthropods
D)flatworms
E)roundworms

Question 27

Which invertebrate animal group is characterized by having a closed circulatory system?

A)Platyhelminthes
B)Nematoda
C)Annelida
D)Echinodermata
E)Arthropoda

Question 28

Hydrae, anemones, and jellyfish are in the phylum:

A)Porifera.
B)Cnidaria.
C)Platyhelminthes.
D)Protista.
E)Flagellates.

Question 29

An animal like a grasshopper can conserve water because it has an elaborately branching system of tubes within its body that it uses for gas exchange. These tubes are called:

A)tracheae.
B)gills.
C)book lungs.
D)flame cells.
E)kidneys.

Question 30

The currents of water (containing food)that pass through a sponge are maintained by:

A)collar cells.
B)ganglia.
C)medusae.
D)the osculum.
E)a water-vascular system.

Question 31

Worms with a well-developed circulatory system (including five pairs of hearts)are:

A)platyhelminths.
B)annelids.
C)echinoderms.
D)nematodes.
E)eels.

Question 32

Sponges have:

A)a gastrovascular cavity.
B)spicules.
C)a nerve net.
D)muscles.
E)an exoskeleton.

Question 33

Flatworms lack:

A)a respiratory system.
B)a reproductive system.
C)a nervous system.
D)a digestive cavity.
E)the ability to move.

Question 34

Ecdysozoans:

A)have trochophore larva.
B)include mollusks, annelids, and flatworms.
C)have a special feeding structure.
D)have a body cavity that forms from the digestive system.
E)periodically shed their outer body covering.

Question 35

A(n)________ provides support and protection to arthropods.

A)cytoskeleton
B)exoskeleton
C)hydrostatic skeleton
D)epidermis
E)shell

Question 36

Which of these groups is characterized by having no body cavity?

A)roundworms
B)annelids
C)arthropods
D)chordates
E)cnidarians

Question 37

Which of these groups is characterized by a lack of symmetry (neither radial nor bilateral)?

A)sponges
B)cnidarians
C)arthropods
D)flatworms
E)chordates

Question 38

________ are characterized by having a pseudocoelom.

A)Roundworms
B)Annelids
C)Arthropods
D)Chordates
E)Cnidarians

Question 39

The phylum Nematoda includes which of the following very common organisms, some of which are parasitic and most of which are often found in soil?

A)segmented worms
B)roundworms
C)flatworms
D)earthworms
E)tapeworms

Question 40

A cnidarian that builds a calcium carbonate skeleton is a(n):

A)oyster.
B)clam.
C)snail.
D)coral.
E)crab.

Question 41

Which of the following animals are arachnids?

A)spiders
B)wasps
C)grasshoppers
D)flukes
E)beetles

Question 42

Members of the phylum ________ are characterized by having tube feet.

A)Echinodermata
B)Mollusca
C)Annelida
D)Platyhelminthes
E)Arthropoda

Question 43

The tube feet of echinoderms that are used for locomotion, capturing prey, and gas exchange are "inflated" by the ________, which is unique to the echinoderms.

A)coelom
B)hydrostatic skeleton
C)tubular gut
D)water-vascular system
E)hemocoel

Question 44

The taxonomic group that contains the largest and most intelligent invertebrates is:

A)Cephalopoda.
B)Gastropoda.
C)Chordata.
D)Aves.
E)Uniramia.

Question 45

A snail is a(n):

A)arthropod.
B)mollusk.
C)chordate.
D)echinoderm.
E)nematode.

Question 46

A sea urchin is a member of the phylum:

A)Echinodermata.
B)Mollusca.
C)Annelida.
D)Platyhelminthes.
E)Arthropoda.

Question 47

The low energy demands of nematodes allow them to survive without a:

A)reproductive system.
B)tubular gut.
C)body cavity.
D)skeleton.
E)respiratory system.

Question 48

Oysters are classified in the phylum:

A)Echinodermata.
B)Mollusca.
C)Annelida.
D)Platyhelminthes.
E)Arthropoda.

Question 49

What characterizes a free-living flatworm?

A)tubular gut
B)hooks
C)cuticle
D)eyespots
E)coelom

Question 50

Adult echinoderms that have radial symmetry lack:

A)a coelom.
B)a head.
C)a method of movement.
D)a tubular gut with separate mouth and anus.
E)nervous tissue.

Question 51

In the various cnidarian species:

A)all live as polyps.
B)all live as medusae.
C)all have polyps as the juvenile stage and medusae as the adult stage.
D)all have medusae as the juvenile stage and polyps as the adult stage.
E)some live as polyps, some as medusae, and some as both in different stages.

Question 52

Which of the following phyla contains animals that reproduce asexually?

A)Cnidaria
B)Mollusca
C)Annelida
D)Platyhelminthes
E)Nematoda

Question 53

A hemocoel or blood cavity is found in or associated with:

A)all animals.
B)an open circulatory system.
C)sponges.
D)cephalopods.
E)acoelomates.

Question 54

A crayfish is a member of the phylum:

A)Echinodermata.
B)Mollusca.
C)Annelida.
D)Platyhelminthes.
E)Arthropoda.

Question 55

The animals most like the ancestral protist colonies that likely gave rise to all animals are:

A)chordates.
B)arthropods.
C)sponges.
D)echinoderms.
E)nematodes.

Question 56

A clam is a(n):

A)arthropod.
B)mollusk.
C)chordate.
D)echinoderm.
E)arachnid.

Question 57

The venomous sea wasp is classified in the phylum:

A)Cnidaria.
B)Mollusca.
C)Annelida.
D)Arthropoda.
E)Nematoda.

Question 58

Spiders belong to the:

A)arthropods.
B)mollusks.
C)chordates.
D)echinoderms.
E)cnidarians.

Question 59

Which of the following animals uses a radula to scrape food into its mouth?

A)octopus
B)starfish
C)scallop
D)rat
E)snail

Question 60

Within the mollusks, only the cephalopods have a:

A)closed circulatory system.
B)tubular gut.
C)coelom.
D)hinged shell.
E)radula.

Question 61

Members of the taxonomic group ________ are best described as having a large, well-developed brain, excellent vision, and being marine carnivorous predators.

A)oligochaetes
B)bivalves
C)gastropods
D)insects
E)cephalopods

Question 62

The endoskeleton of an echinoderm is composed of:

A)cellulose.
B)calcium carbonate.
C)silica.
D)chitin.
E)lignan.

Question 63

The only invertebrates capable of flight are arachnids. True or False?

Question 64

Parasitic tapeworms are members of the phylum:

A)Cnidaria.
B)Platyhelminthes.
C)Annelida.
D)Arthropoda.
E)Nematoda.

Question 65

Flatworms have a coelom that is only partially surrounded with mesoderm. True or False?

Question 66

The leeches used by doctors to prevent blood clotting and stimulate the growth of blood vessels in patients recovering from reconstructive surgery are members of the phylum:

A)Cnidaria.
B)Platyhelminthes.
C)Annelida.
D)Arthropoda.
E)Nematoda.

Question 67

Animal cells lack a cell wall. True or False?

Question 68

Sea stars (starfish)are bilaterally symmetrical at one time in their life cycle. True or False?

Question 69

Sponges are radially symmetrical. True or False?

Question 70

A closed circulatory system is characteristic of:

A)flatworms.
B)annelids.
C)cnidarians.
D)sponges.
E)comb jellies.

Question 71

Charles Darwin wrote that members of the phylum ________ are particularly important for agriculture because they mix and aerate soil.

A)Cnidaria
B)Platyhelminthes
C)Annelida
D)Arthropoda
E)Nematoda

Question 72

Animals obtain energy through photosynthesis. True or False?

Question 73

A hemocoel is part of an open circulatory system. True or False?

Question 74

Groups of similar cells that function together form ________.

Question 75

An arthropod exoskeleton is composed of:

A)cellulose.
B)calcium carbonate.
C)silica.
D)chitin.
E)lignan.

Question 76

Of all of the invertebrate phyla, only members of the phylum ________ can fly.

A)Cnidaria
B)Platyhelminthes
C)Annelida
D)Arthropoda
E)Nematoda

Question 77

An animal whose body cavity is completely lined with mesoderm has a pseudocoelom. True or False?

Question 78

Chordates and echinoderms are both protostomes. True or False?

Question 79

Most animal phyla are radially symmetrical. True or False?

Question 80

Cephalopods are the only mollusks that have a closed circulatory system. True or False?