Deck 24: Animal Diversity I: Invertebrates

Question 1

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

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

Answer 1

E

Question 2

Organisms that are radially symmetrical have _ embryonic germ layers.

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

Answer 2

A

Question 3

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

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

Answer 3

E

Question 4

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

A) Coelom
B) Cephalization
C) Lack of organs
D) Gastrovascular cavity
E) Mesoderm

Question 5

The only animals that lack tissues are

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

Question 6

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

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

Question 7

The common ancestor of sponges and other animals was probably

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

Question 8

How many tissue layers are in the embryos of sponges?

A) None
B) One
C) Two
D) Three
E) Four

Question 9

An arthropod embryo has _ germ layer(s).

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

Question 10

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

A) Roundworms
B) Annelids
C) Echinoderms
D) Flatworms
E) Sponges

Question 11

The major difference between protostomes and deuterostomes is the

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

Question 12

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

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

Question 13

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

A) Sessile or otherwise nonmobile
B) Mobility
C) Gastrovascular cavity
D) Cephalization
E) Mesoderm

Question 14

All animals with tissues have

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

Question 15

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 16

In the animal kingdom, cephalization is

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

Question 17

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

A) Ectoderm
B) Endoderm
C) Mesoderm

Question 18

Anemones have no

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

Question 19

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

A) Circulatory tissue
B) Body cavity linings
C) Muscles
D) Skeletal tissue
E) Nervous tissue

Question 20

The skin and nervous tissues develop from which germ layer?

A) Endoderm
B) Mesoglea
C) Mesoderm
D) Ectoderm
E) Protoplasm

Question 21

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

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

Question 22

Insects are members of the group

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

Question 23

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

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

Question 24

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

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

Question 25

Which cnidarian is the basis of many impressively diverse marine habitats?

A) Coral
B) Jellyfish
C) Sea cucumber
D) Hydra
E) Anemone

Question 26

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

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

Question 27

A(n) provides support and protection to arthropods.

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

Question 28

are characterized by having a pseudocoelom.

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

Question 29

Giant squids are classified as

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

Question 30

Flatworms lack

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

Question 31

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

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

Question 32

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

A) Trichinella
B) Amoebas
C) Echinoderms
D) Parasitic flatworms called blood flukes
E) Nematodes

Question 33

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

A) Arthropods
B) Sponges
C) Cnidarians
D) Flatworms
E) Chordates

Question 34

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

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

Question 35

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) Flatworms
B) Earthworms
C) Tapeworms
D) Segmented worms
E) Roundworms

Question 36

An animal such as 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) book lungs.
B) gills.
C) flame cells.
D) tracheae.
E) kidneys.

Question 37

Ecdysozoans

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

Question 38

Hydra, anemones, and jellyfish are in the phylum

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

Question 39

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

A) Cnidarians
B) Flatworms
C) Sponges
D) Arthropods
E) Roundworms

Question 40

Sponges have

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

Question 41

Spiders belong to the

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

Question 42

What distinguishes a free- living flatworm from other organisms?

A) Eyespots
B) A tubular gut
C) A cuticle
D) Hooks
E) A coelom

Question 43

The venomous sea wasp is classified in the phylum

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

Question 44

A crayfish is a member of the phylum

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

Question 45

Oysters are classified in the phylum

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

Question 46

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

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

Question 47

A clam is a(n)

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

Question 48

Which of the following animals are arachnids?

A) Spiders
B) Wasps
C) Flukes
D) Beetles
E) Grasshoppers

Question 49

Which of the following phyla contains animals that reproduce asexually?

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

Question 50

Members of the phylum are characterized by having tube feet.

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

Question 51

A sea urchin is a member of the phylum

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

Question 52

A snail is a(n)

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

Question 53

A hemocoel or blood cavity is found in or associated with

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

Question 54

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

A) Starfish
B) Rat
C) Snail
D) Scallop
E) Octopus

Question 55

The taxonomic group that contains the most species and seemingly most intelligent invertebrates is

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

Question 56

In the various cnidarian species

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

Question 57

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

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

Question 58

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

Question 59

Adult echinoderms that have radial symmetry lack

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

Question 60

Within the mollusks, only the cephalopods have a

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

Question 61

Parasitic tapeworms are members of the phylum

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

Question 62

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

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

Question 63

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

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

Question 64

Most animal phyla are radially symmetrical.

Question 65

Animal cells lack a cell wall.

Question 66

An animal whose body cavity is completely lined with mesoderm has a pseudocoelom.

Question 67

The only invertebrates capable of flight are arachnids.

Question 68

Flatworms have a coelom that is only partially surrounded with mesoderm.

Question 69

Chordates and echinoderms are both protostomes.

Question 70

Cephalopods are the only mollusks that have a closed circulatory system.

Question 71

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

Question 72

Sponges are radially symmetrical.

Question 73

The endoskeleton of an echinoderm is composed of

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

Question 74

Groups of similar cells that function together form .

Question 75

The is the embryonic germ layer that develops into nervous tissue.

Question 76

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

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

Question 77

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

Question 78

Animals obtain energy through photosynthesis.

Question 79

A hemocoel is part of an open circulatory system.

Question 80

An arthropod exoskeleton is composed of

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