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Multiple Choice Quiz
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1

Gastrula:
A)it's from this stage that the digestive tract develops.
B)a hollow ball of cells
C)an opening in the embryo.
D)a solid ball of cells.
2

Morula:
A)it's from this stage that the digestive tract develops.
B)a hollow ball of cells
C)an opening in the embryo.
D)a solid ball of cells.
3

Blastula:
A)it's from this stage that the digestive tract develops.
B)a hollow ball of cells
C)an opening in the embryo.
D)a solid ball of cells.
4

Blastopore:
A)it's from this stage that the digestive tract develops.
B)a hollow ball of cells
C)an opening in the embryo.
D)a solid ball of cells.
5

Although subkingdom Parazoa is classified in kingdom Animalia its members differ from the Eumetazoans in the following way(s)?
A)The parazoans have unique organ systems not seen in the eumetazoans.
B)The parazoans lack tissues and organs.
C)The parazoans lack a definite symmetry.
D)The parazoans only reproduce asexually.
E)both b and c
6

Protists called _________ were probably the ancestors of sponges and may have been the ancestors of all animals.
A)nematocysts
B)cnidarians
C)cnidocytes
D)choanoflagellates
E)ectoderms
7

Parasitic flatworms are protected from the digestive enzymes of their host by
A)a hard cyst.
B)endospores.
C)resistant epithelial layers.
D)enzymes of their own.
E)none of the above
8

The flatworms are the simplest organisms in which _________ occur.
A)discrete reproductive structures
B)sensory structures
C)a nervous system
D)organs
E)eggs
9

Whip-like bodies:
A)Rotifers
B)Nematodes
10

Common in the soil:
A)Rotifers
B)Nematodes
11

They have a crown of cilia on their head
A)Rotifers
B)Nematodes
12

Stylets:
A)Rotifers
B)Nematodes
13

Arthropods have not been able to achieve great size because
A)the type of organ systems they possess could not support such a development.
B)they would be unable to successfully reproduce.
C)chitin is brittle and must be thick to bear the pull of muscles.
D)their vision is not good enough to hunt larger prey.
E)none of the above
14

Of the chelicerates, which of the following transmits Lyme disease to humans?
A)spiders
B)mites
C)scorpions
D)ticks
E)annelids
15

Echinoderms are bilaterally symmetrical as larvae but become radially symmetrical as adults.
A)True
B)False
16

Echinoderms are bilaterally symmetrical as larvae but become radially symmetrical as adults.
A)True
B)False
17

Animal(s)
A)cells lack cell walls.
B)sometimes have cell walls, such as in the arthropods.
C)are always mobile.
D)are heterotrophic or autotrophic
E)are found primarily on land.
18

Choanocytes are
A)primitive organs in sponges that function in digestion.
B)flagellated cells that draw water through the body cavity of sponges.
C)amoeba-like cells that wander over the surface of sponges and distribute nutrients to other cells.
D)calcium deposits that provide structure to sponges.
E)both a and b
19

One property that sponges share in common with many other animals is
A)a life cycle that involves alternation of generations.
B)a free-swimming medusa in its life cycle.
C)cell recognition.
D)the ability to digest cellulose.
E)none of the above
20

Cnidarians project a nematocyst to capture their prey by
A)ejecting it with a jet of water.
B)using a springlike apparatus.
C)building up a high internal osmotic pressure.
D)employing simple muscle fibers.
E)coiling and releasing the tendrils on which the nematocysts are found.
21

The cnidarians have which of the following evolutionary advances over the sponges?
A)bilateral symmetry
B)cephalization
C)a life cycle involving a dominant haploid form
D)extracellular digestion
E)a nonmotile mature form
22

Which of the following is an example of an organism with the medusae body form?
A)a sponge
B)a hydra
C)a coral
D)an amoeba
E)a jellyfish
23

Most cnidarians
A)exist only as medusa in their life cycle.
B)exist only as polyps in their life cycle.
C)encyst when they encounter adverse environmental conditions.
D)alternate between a polyp and a medusa during their life cycle.
E)none of the above
24

Cephalization is
A)an evolutionary trend in the cnidarians.
B)the evolution of a head.
C)the lack of a distinctive head seen in the primitive animal phyla.
D)the trend towards bilateral symmetry seen in the chordates.
E)missing in many of the animal phyla.
25

An example of an animal with a pseudocoelomate body is (are)
A)hydra.
B)planaria.
C)rotifers.
D)Dugesia.
E)jellyfish.
26

A radula is
A)a sharp structure that is injected into the prey of a mollusk.
B)a protective coating made of calcium carbonate on sponges.
C)a small, internal shell found in cephalopods.
D)a rasping, tonguelike organ in mollusks.
E)necessary for mollusks to be motile.
27

The segments of annelids are
A)actually one large unit internally.
B)partitioned internally.
C)specialized for different functions.
D)not present in all species.
E)both b and c
28

Rocky Mountain spotted fever and Lyme disease are caused by a(n)
A)insect.
B)protozoan.
C)fungus.
D)nematode.
E)arachnid.
29

How do the crustaceans differ from the insects?
A)Crustaceans have an exoskeleton made of chitin.
B)Crustaceans have legs on their abdomen and thorax.
C)Crustaceans have jointed appendages.
D)Crustaceans are exclusively found in marine habitats.
E)both a and c
30

Malpighian tubules
A)assist ecinoderms in motility.
B)regulate osmotic pressure in insect cells.
C)play a major role in digestion in insects.
D)function in excretion in insects.
E)secrete the exoskeleton in insects.
31

Animals in which the blastopore becomes the mouth are called
A)stomates.
B)deuterostomes.
C)protostomes.
D)echinostomes.
E)prestomes.
32

The significance of a notochord in the evolution of chordates is that it
A)provided an internal attachment point for muscles.
B)allowed for the development of a more complex nervous system.
C)eliminated the need for segmentation.
D)allow the organism to grow larger.
E)both a and c





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