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Zoology Unit 3 Test

Total questions: 94

Worksheet time: 50mins

Name
Class
Date
1.

Which is a proper group of cnidarians?

a)

Jellyfish, box jellyfish, nudibranchs

b)

Squid, snail, jellyfish, coral

c)

Portuguese man o’ war, coral, sea anemone

d)

Box jellyfish, sea star, coral

2.

How many species of cnidarians have been discovered so far?

a)

5

b)

580

c)

14,515

d)

1.6 million

e)

8.7 million

3.

Which is true of cnidarians?

a)

They are diploblastic, neither protostomes nor deuterostomes, with radial symmetry

b)

They are diploblastic, neither protostomes nor deuterostomes, with asymmetry

c)

They are diploblastic protostomes with radial symmetry

d)

They are triploblastic deuterostomes with asymmetry

e)

They are triploblastic, neither protostomes nor deuterostomes, with radial symmetry

4.

Where would you not find a living cnidarian?

a)

Freshwater

b)

Cold saltwater

c)

Deep saltwater

d)

On land

e)

Warm saltwater

5.

We have confirmed fossil records of cnidarians from up to...

a)

5,000 years ago

b)

3 million years ago

c)

20 million years ago

d)

580 million years ago

e)

300 billion years ago

6.

Which is true of cnidarians?

a)

They are all sessile

b)

They have true organs

c)

There are more freshwater species than marine species

d)

They are herbivores

e)

They have true tissues

7.

Which is true of cnidarians?

a)

Adult box jellyfish exhibit the medusa body plan

b)

Sea anemones are free-swimming

c)

Adult jellyfish exhibit the polyp body plan

d)

Hydra exhibit the medusa body plan

8.

Which is true of cnidarians?

a)

Jellyfish reproduce sexually as polyps and asexually as medusae

b)

Many cnidarians switch between polyp and medusa body plans throughout their life cycle

c)

A medusoid cnidarian never alternates to a polyp body plan

d)

A polypoid cnidarian never alternates to a medusoid body plan

9.

What is true of the cnidocytes of a cnidarian?

a)

Cnidocytes are used to defend the cnidarian from predators, such as humans

b)

Some cnidarians don’t have cnidocytes, which is why they cannot hurt humans

c)

Cnidocytes electrocute prey

d)

Cnidocytes are used to capture and immobilize prey by stopping its heart and nervous system

10.

Which is true of the medusa body plan of cnidarians?

a)

Medusae are stalk-like, sessile, with the mouth facing up

b)

Medusae are umbrella-like, sessile, with the mouth facing down

c)

Medusae are umbrella-like, free-swimming, with the mouth facing down

d)

Medusae are stalk-like, free-swimming, with the mouth facing up

11.

Which statement about the digestive system of a cnidarian is true?

a)

They have an incomplete digestive system because they have only a mouth and a gastrovascular cavity

b)

They have a complete digestive system with a separate mouth and anus

c)

They have a complete digestive system because they have a mouth and gastrovascular cavity

d)

They have an incomplete digestive system with a separate mouth and anus

12.

How are nutrients passed throughout the body of a cnidarian?

a)

Nutrients are absorbed from the water by the ectoderm and endoderm

b)

By the nerve net

c)

Through the mesoglea

d)

Through the circulatory system

e)

Through the mesohyl

13.

Which is true of cnidarians?

a)

Cnidarians have a formal respiratory system and obtain oxygen via their gills

b)

Cnidarians do not have a formal respiratory system and obtain oxygen by diffusion

c)

Cnidarians have a formal respiratory system and obtain oxygen via their lungs

14.

Which cnidarian would have the most complex nervous system?

a)

A jellyfish

b)

A coral

c)

A sea anemone

d)

A Portuguese man o’ war

15.

Which is NOT true of the cnidarian nervous system?

a)

Jellyfish and box jellyfish have clusters of sensory cells called rhopalia on their bell

b)

Nerve cells are scattered through the body, forming a nerve net

c)

The nervous system allows a cnidarian to move their tentacles, contract their bell, and egest waste

d)

Cnidarians have a simple brain called a ganglia

16.

Which is true of cnidarians?

a)

Cnidarians can reproduce asexually or sexually; cnidarians are usually separate males and females

b)

Cnidarians can reproduce asexually or sexually; cnidarians are usually hermaphrodites

c)

Cnidarians can reproduce sexually only; cnidarians are usually separate males and females

d)

Cnidarians can reproduce asexually only; cnidarians are usually hermaphrodites

17.

About 10 species of cnidarians live in the freshwater of North America.

a)

True

b)

False

18.

All cnidarians are carnivores.

a)

True

b)

False

19.

The trigger of a cnidocyte is also known as the operculum.

a)

True

b)

False

20.

An example of an organ that a cnidarian has is a simple stomach.

a)

True

b)

False

21.

Sea anemone, coral, and hydra are of the polyp body plan.

a)

True

b)

False

22.

Rhopalia enable a box jellyfish to see images.

a)

True

b)

False

23.

Polyps reproduce asexually by budding.

a)

True

b)

False

24.

Coral reefs support less than 1% of marine species.

a)

True

b)

False

25.

Nudibranchs eat cnidarians and steal their cnidocytes and stinging ability.

a)

True

b)

False

26.

Sea anemones and clownfish are involved in a win-win relationship.

a)

True

b)

False

27.

Which structure anchors the hydra to the ground? Which structure is a jelly-like substance that serves as a skeleton to provide support to the animal? Which structure is the layer of cells that lines the gastrovascular cavity? Which structure is the site of ingestion and egestion? Which structure is responsible for breaking down of food, absorption of nutrients, and diffusion of gases? Which structure is the result of asexual reproduction? Which structure is the outer layer of cells surrounding the animal? Which structure is covered in cnidocytes and functions to capture prey?

a)

Basal disk

1.

Basal disk

b)

Mesoglea

2.

Mesoglea

c)

Endoderm

3.

Endoderm

d)

Mouth

4.

Mouth

e)

Gastrovascular cavity

5.

Gastrovascular cavity

28.

How many phyla of animals are currently recognized?

a)

3

b)

7

c)

9

d)

23+

e)

30+

29.

Which is NOT a phylum of animals?

a)

Archaea

b)

Chordata

c)

Echinodermata

d)

Platyhelminthes

e)

Nematoda

30.

Which phylum name means "stinging"?

a)

Mollusca

b)

Arthropoda

c)

Cnidaria

d)

Nematoda

31.

Which phylum name means "roundworms"?

a)

Cnidaria

b)

Annelida

c)

Nematoda

d)

Arthropoda

32.

Which phylum name means "jointed legs"?

a)

Arthropoda

b)

Echinodermata

c)

Chordata

d)

Platyhelminthes

33.

Which phylum name means "spiny skin"?

a)

Arthropoda

b)

Echinodermata

c)

Chordata

d)

Cnidaria

34.

Which phylum name means "segmented worms"?

a)

Arthropoda

b)

Chordata

c)

Echinodermata

35.

Which animals are included in Cnidaria?

a)

Jellyfish & sea anemones

b)

Clams, oysters, squid, octopus, snails

c)

Planarians and tapeworms

d)

Insects, spiders, crustaceans

36.

Which animal is NOT included within Chordata?

a)

Spiders

b)

Mammals

c)

Amphibians

d)

Reptiles

e)

Fish

37.

Which animals are included in Porifera?

a)

Jellyfish & sea anemones

b)

Sponges

c)

Planarians and tapeworms

d)

Earthworms and leeches

38.

Which animals are included within Platyhelminthes?

a)

Planarians and tapeworms

b)

Pinworms and ascaris

c)

Earthworms and leeches

d)

Starfish, sea urchins, sea cucumbers

39.

Which animals are included within Annelida?

a)

Planarians and tapeworms

b)

Earthworms and leeches

c)

Clams, oysters, squid, octopus, snails

d)

Insects, spiders, crustaceans

40.

Which animals are included within Mollusca?

a)

Insects, spiders, crustaceans

b)

Starfish, sea urchins, sea cucumbers

c)

Jellyfish & sea anemones

d)

Clams, oysters, squid, octopus, snails

41.

Which animals are included within Arthropoda?

a)

Mammals, reptiles, amphibians, fish, birds

b)

Starfish, sea urchins, sea cucumbers

c)

Insects, spiders, crustaceans

d)

Clams, oysters, squid, octopus, snails

42.

Which animals are included within Echinodermata?

4 lines
43.

Which embryos develop into a blastocyst with an inner cell mass?

a)

Fish

b)

Sponge

c)

Cnidarian

d)

Echinoderm

e)

Mammal

44.

Which structure of embryonic development has germ layers?

a)

Gastrula

b)

Blastula

c)

Cleavage

d)

Morula

e)

Zygote

45.

When is an embryo classified as a blastula?

a)

When it folds in on itself

b)

When it splits into two cells

c)

When the sperm enters the egg

d)

When it is over 100 cells

e)

When it is between 8 and 32 cells

46.

Which phyla include diploblasts?

a)

Arthropoda and Mollusca

b)

Porifera and Cnidaria

c)

Platyhelminthes and Nematoda

d)

Chordata and Echinodermata

47.

What is the mesoderm?

a)

The opening at the end of the gastrula that becomes the mouth or the anus

b)

The non-living layer in diploblasts between the ectoderm and endoderm

c)

The inner layer of the gastrula

d)

The middle layer of the gastrula

e)

A body cavity filled with fluid

48.

Which group of organisms develops a body cavity in the mesoderm?

a)

Coelomates

b)

Acoelomates

c)

Deuterostomes

d)

Diploblasts

e)

Protostomes

49.

Which group of animals are acoelomates?

a)

Roundworms

b)

Segmented worms

c)

Mollusks

d)

Arthropods

e)

Flatworms

50.

72. Animals with ________________ symmetry have their body parts arranged around a central axis.

a)

radial

b)

bilateral

c)

asymmetrical

d)

lateral

51.

The pad of a dog’s paw is (a)   compared to the top of the paw.

Choose from the below words

Medial

Palmar

Rostral

Dorsal

52.

Your elbow is (a)   compared to your wrist.

Choose from the below words

Proximal

Distal

Palmar

Caudal

53.

Most animals develop from a fertilized egg.

a)

TRUE

b)

FALSE

54.

The endoderm develops into the nervous system, skin, and hair.

a)

TRUE

b)

FALSE

55.

The mesoderm develops into muscles, blood, bone, and cartilage.

a)

TRUE

b)

FALSE

56.

Coelomates are more complex than pseudocoelomates.

a)

TRUE

b)

FALSE

57.

Worms, mollusks, and arthropods are deuterostomes.

a)

TRUE

b)

FALSE

58.

Animals with radial symmetry are often sessile or move slowly.

a)

TRUE

b)

FALSE

59.

Which vocabulary word fits each description. A triploblast that develops a “false” coelom between the endoderm and mesoderm:

a)

PSEUDOCOELOMATE

b)

ACOELMATE

c)

COELOMATE

d)

DIPLOBLAST

60.

Which vocabulary word fits each description. A triploblast in which the blastopore develops into a mouth:

a)

PROTOSTOME

b)

DEUTEROSTOME

c)

COELOMATE

d)

ACOELOMATE

61.

Which vocabulary word fits each description. The outer layer of the gastrula: ____________

a)

ECTODERM

b)

ENDODERM

c)

MESODERM

d)

BLASTOCOEL

62.

Which vocabulary word fits each description. An organism that obtains nutrition by eating other dead or living things: ____________

a)

HETEROTROPH

b)

AUTOTROPH

c)

PRODUCER

d)

PHOTOTROPH

63.

Which vocabulary word fits each description. A directional term that means “towards the tail.”

a)

CAUDAL

b)

CRANIAL

c)

VENTRAL

d)

DORSAL

64.

Which vocabulary word fits each description. A directional term that means “towards the belly.”

a)

VENTRAL

b)

DORSAL

c)

LATERAL

d)

POSTERIOR

65.

How many species of sponges have been discovered so far?

a)

23

b)

8,550

c)

20,320

d)

1.6 million

e)

8.7 million

66.

Which is true of sponges?

a)

They are diploblastic, neither protostomes nor deuterostomes, with radial symmetry

b)

They are triploblastic deuterostomes with asymmetry

c)

They are diploblastic protostomes with radial symmetry

d)

They are triploblastic, neither protostomes nor deuterostomes, with asymmetry

e)

They are diploblastic, neither protostomes nor deuterostomes, with asymmetry

67.

Where would you not find a living sponge?

a)

Freshwater

b)

Cold saltwater

c)

Deep saltwater

d)

On land

e)

Warm saltwater

68.

We have confirmed fossil records of sponges from up to...

a)

5,000 years ago

b)

3 million years ago

c)

20 million years ago

d)

500 million years ago

e)

300 billion years ago

69.

A group of sponges living together is known as a _______________.

a)

Colony

b)

Pod

c)

Swarm

d)

Bloom

70.

What is the proper pathway of water through the body plan of a simple sponge?

a)

Osculum to ostia to spongocoel

b)

Spongocoel to osculum to ostia

c)

Ostia to spongocoel to osculum

71.

Which is the best description of a simple sponge body plan?

a)

An outer and inner layer of cells separated by mesohyl

b)

Thick, layers upon layers of cells on the outside and inside of a soft skeleton

c)

Three layers of cells on the outside, three layers of cells on the inside

d)

An outer and inner layer of cells separated by a third layer of inner cells

72.

Which cell is responsible for the digestion of food in a sponge?

a)

Pinacocyte

b)

Choanocyte

c)

Porocyte

d)

Sclerocyte

e)

Spongocyte

73.

The body plan of every sponge is designed with what primary goal in mind?

a)

Maximize the ability for the sponge to shift or slowly move away from predators and danger

b)

Minimal contact with water to minimize the impact of harmful water conditions

c)

Communication between cells of the nervous system to effectively control the body of the sponge

d)

Efficient water flow through the sponge

74.

Most sponges are filter feeders. What does this mean?

a)

A filter feeder is an organism that preys on other animals for food.

b)

A filter feeder is an organism that produces its own food through photosynthesis.

c)

A filter feeder is an organism that obtains small food particles by straining them from the surrounding water.

d)

A filter feeder is an organism that relies on scavenging for its food.

75.

What is the job of the excretory system of an animal?

a)

To get rid of waste

b)

To sense, understand, and respond to their environment

c)

To break down food and absorb nutrients

d)

To bring oxygen into the body and deliver it to the cells

76.

Which is NOT an option for how sponges reproduce?

a)

Cells on the side or base of the sponge begin to bulge out and form a new sponge

b)

Internal buds form inside the sponge, becoming adult sponges when water conditions are favorable

c)

Two touching sponges can transfer sperm and eggs with each other via their pinacocytes

d)

A sponge releases sperm in the water which enter another sponge, fertilizing the eggs on the inside

77.

What is a hermaphrodite?

a)

An organism that can produce both eggs and sperm

b)

An organism that produces neither eggs nor sperm

c)

An organism that is capable of both asexual and sexual reproduction

d)

An organism that can fertilize its own eggs

78.

Which is a true sequence of events in sponge sexual reproduction?

a)

A sponge releases egg cells through its ostia, which enter the osculum of another sponge

b)

A sponge releases sperm cells through its ostia, which enter the osculum of another sponge

c)

A sponge releases eggs through its osculum, which enter the ostia of another sponge

79.

Which is a true sequence of events in sponge sexual reproduction?

a)

Sperm cells are too large to fit through the ostia, so they become trapped. Fertilization occurs in the ostia.

b)

Choanocytes trap the sperm cells, transferring them to the mesohyl where they fertilize the egg cells.

c)

The egg cells are held in place by the choanocytes. The sperm cells can fertilize the egg cells inside the spongocoel.

80.

Which is a true sequence of events in sponge sexual reproduction?

a)

The zygotes develop into buds, which can grow on the outside or inside of the sponge.

b)

The zygotes develop into swimming larva, are released from the adult sponge, and swim until they develop further and settle on a surface.

c)

The zygotes develop into larva that look like small sponges, which are shot out of the sponge and float freely through the ocean until they settle on the ground.

81.

Which class of sponges are glass sponges with strong, lattice-like “skeleton” made of fused silica spicules?

a)

Calcarea

b)

Demospongiae

c)

Hexactinellida

d)

Homoscleromorpha

82.

Which class of sponges have spicules made of calcium carbonate in their “skeleton” and can only survive in shallow, marine waters?

a)

Calcarea

b)

Demospongiae

c)

Hexactinellida

d)

Homoscleromorpha

83.

Which class of sponges are the most diverse class, containing over 90% of sponges?

a)

Calcarea

b)

Demospongiae

c)

Hexactinellida

d)

Homoscleromorpha

84.

Which class of sponges includes encrusting sponges and sponges with small, simple silica spicules?

a)

Calcarea

b)

Demospongiae

c)

Hexactinellida

d)

Homoscleromorpha

85.

Which class of sponges has spongin within their internal “skeleton?”

a)

Calcarea

b)

Demospongiae

c)

Hexactinellida

d)

Homoscleromorpha

86.

Sponges can live up to 5.5 miles deep in the ocean.

a)

True

b)

False

87.

Sponges can be unicellular.

a)

True

b)

False

88.

Sponges lack tissues and organs.

a)

True

b)

False

89.

Some deep-sea sponges trap and engulf small crustaceans.

a)

True

b)

False

90.

Sponges have a formal respiratory system.

a)

True

b)

False

91.

Sponges are capable of sensing light, chemicals, flow rate, and temperature.

a)

True

b)

False

92.

Most household sponges today are sea sponges.

a)

True

b)

False

93.

There are no natural predators of sponges due to their spicules and toxins.

a)

True

b)

False

94.

Sponges have a formal nervous system.

a)

True

b)

False