Question 1

Which is NOT a feature of the proglottids of cestodes?

Accepted Answer

A)  Proglottids are capable of cross-fertilisation. 
B)  Proglottids grow from the anterior end. 
C)  There is an indeterminate number of proglottids in the adult. 
D)  Proglottids contain an alimentary canal. 
E)  Proglottids have many body segments produced by strobilisation. 
A)  Proglottids are capable of cross-fertilisation. 
B)  Proglottids grow from the anterior end. 
C)  There is an indeterminate number of proglottids in the adult. 
D)  Proglottids contain an alimentary canal. 
E)  Proglottids have many body segments produced by strobilisation.

Question 2

Where does the anus form in deuterostomes?

Accepted Answer

A)  In a split in the mesoderm 
B)  Within the radial arch of the archenteron. 
C)  At the gut apex 
D)  At the site of the blastopore 
E)  From a budding outcrop that extends from the coelom 
A)  In a split in the mesoderm 
B)  Within the radial arch of the archenteron. 
C)  At the gut apex 
D)  At the site of the blastopore 
E)  From a budding outcrop that extends from the coelom

Question 3

Flatworms have specialised cells for excretion called

Accepted Answer

A)  rhabdites. 
B)  flame cells. 
C)  the germ layer. 
D)  protonephridia. 
E)  kidneys. 
A)  rhabdites. 
B)  flame cells. 
C)  the germ layer. 
D)  protonephridia. 
E)  kidneys.

Question 4

Differences between protostomes and deuterostomes are first evident at

Accepted Answer

A)  coelom formation. 
B)  gastrulation. 
C)  cleavage. 
D)  neurulation. 
E)  splitting of the mesoderm. 
A)  coelom formation. 
B)  gastrulation. 
C)  cleavage. 
D)  neurulation. 
E)  splitting of the mesoderm.

Question 5

Which Phylum could be described as acoelomate, bilaterally symmetrical and protostome?

Accepted Answer

A)  Porifera 
B)  Cnidaria 
C)  Platyhelminthes 
D)  Nematoda 
E)  Cestoda 
A)  Porifera 
B)  Cnidaria 
C)  Platyhelminthes 
D)  Nematoda 
E)  Cestoda

Question 6

The main difference between eumetazoans and parazoans is that

Accepted Answer

A)  parazoans do not have an embryonic stage. 
B)  parazoans do not have cell layers. 
C)  parazoans do not have differentiated cells. 
D)  parazoans have no tissues or organs. 
E)  eumetazoans have a complex nervous system. 
A)  parazoans do not have an embryonic stage. 
B)  parazoans do not have cell layers. 
C)  parazoans do not have differentiated cells. 
D)  parazoans have no tissues or organs. 
E)  eumetazoans have a complex nervous system.

Question 7

Which class of cnidarians never have a medusa stage in their life cycle?

Accepted Answer

A)  Class Cubozoa 
B)  Class Scyphozoa 
C)  Class Anthozoa 
D)  Class Hydrozoa 
E)  Class Anthozoa and Class Hydrozoa 
A)  Class Cubozoa 
B)  Class Scyphozoa 
C)  Class Anthozoa 
D)  Class Hydrozoa 
E)  Class Anthozoa and Class Hydrozoa

Question 8

Amoebocytes in sponges are described as totipotent because of their ability to

Accepted Answer

A)  protect other cells from disease. 
B)  divide and give rise to any other cell of the sponge. 
C)  form a protective coating over the sponge. 
D)  secrete spicules. 
E)  contain three layers of cells. 
A)  protect other cells from disease. 
B)  divide and give rise to any other cell of the sponge. 
C)  form a protective coating over the sponge. 
D)  secrete spicules. 
E)  contain three layers of cells.

Question 9

Based on molecular data, the Platyhelminthes are grouped in which major clade?

Accepted Answer

A)  Protonephridia. 
B)  Ctenophora. 
C)  Anthozoa 
D)  Cubozoa 
E)  Lophotrochozoa 
A)  Protonephridia. 
B)  Ctenophora. 
C)  Anthozoa 
D)  Cubozoa 
E)  Lophotrochozoa

Question 10

Ctenophorans are thought to be related to cnidarians because

Accepted Answer

A)  at least one group also possesses nematocysts. 
B)  they have eight ciliary plates. 
C)  they look like the medusoid stage of some cnidarians. 
D)  they have a similar digestive system. 
E)  they have only a polyp form like some cnidarians. 
A)  at least one group also possesses nematocysts. 
B)  they have eight ciliary plates. 
C)  they look like the medusoid stage of some cnidarians. 
D)  they have a similar digestive system. 
E)  they have only a polyp form like some cnidarians.

Question 11

Animals in phylum Nemertea are called proboscis worms because they have a distinctive

Accepted Answer

A)  eversible pharynx to suck up food. 
B)  proboscis that emerges from the mouth. 
C)  proboscis for chewing food. 
D)  tube-like structure to attach to the host. 
E)  retractable proboscis for capturing prey. 
A)  eversible pharynx to suck up food. 
B)  proboscis that emerges from the mouth. 
C)  proboscis for chewing food. 
D)  tube-like structure to attach to the host. 
E)  retractable proboscis for capturing prey.

Question 12

The following is a description of an animal parasite. The parasite may be found in blood vessels of the human intestine. Eggs pass through into the alimentary canal and are released in the faeces. Larval stages are found in a freshwater snail as a secondary host. Re-infection of humans occurs through the skin. The animal described is most likely to be

Accepted Answer

A)  Ascaris lumbricoides. 
B)  Wucheria bancrofti. 
C)  Schistosoma japonicum. 
D)  Taenia sp. 
E)  Fasciola hepatica. 
A)  Ascaris lumbricoides. 
B)  Wucheria bancrofti. 
C)  Schistosoma japonicum. 
D)  Taenia sp. 
E)  Fasciola hepatica.

Question 13

It is believed that metazoans could have evolved from

Accepted Answer

A)  eumetazoans. 
B)  colonial protists. 
C)  flagellated monerans. 
D)  trichoplax. 
E)  None of the answers are correct. 
A)  eumetazoans. 
B)  colonial protists. 
C)  flagellated monerans. 
D)  trichoplax. 
E)  None of the answers are correct.

Question 14

Which layer is NOT present in the body wall of a cnidarian?

Accepted Answer

A)  Ectoderm. 
B)  Endoderm. 
C)  Mesoglea. 
D)  Mesoderm. 
E)  All of the answers are correct. 
A)  Ectoderm. 
B)  Endoderm. 
C)  Mesoglea. 
D)  Mesoderm. 
E)  All of the answers are correct.

Question 15

Despite often living in the bladder, why is the blood fluke, Schistosoma, not easily washed out of its host?

Accepted Answer

A)  They secrete a glue-like substance that attaches them firmly to the walls of the tissues they colonise. 
B)  Blood flukes grow a rhizoid that secures them to the host tissue. 
C)  They secrete a protease enzyme that partially degrades host wall tissue, after which the abaxial axis of the fluke effectively 'fuses' with the degraded host tissue, permanently anchoring the fluke in place. 
D)  They live in blood vessels in the tissue walls. 
E)  They have a posterior with hooks and barbs. 
A)  They secrete a glue-like substance that attaches them firmly to the walls of the tissues they colonise. 
B)  Blood flukes grow a rhizoid that secures them to the host tissue. 
C)  They secrete a protease enzyme that partially degrades host wall tissue, after which the abaxial axis of the fluke effectively 'fuses' with the degraded host tissue, permanently anchoring the fluke in place. 
D)  They live in blood vessels in the tissue walls. 
E)  They have a posterior with hooks and barbs.

Question 16

A consequence of the absence of a coelom in platyhelminths is that

Accepted Answer

A)  they are dorsiventrally flattened to facilitate transport of essential substances. 
B)  they are always parasitic. 
C)  specialisation of organs is limited. 
D)  they are dorsiventrally flattened to facilitate transport of essential substances and they are always parasitic. 
E)  they are dorsiventrally flattened to facilitate transport of essential substances and specialisation of organs is limited. 
A)  they are dorsiventrally flattened to facilitate transport of essential substances. 
B)  they are always parasitic. 
C)  specialisation of organs is limited. 
D)  they are dorsiventrally flattened to facilitate transport of essential substances and they are always parasitic. 
E)  they are dorsiventrally flattened to facilitate transport of essential substances and specialisation of organs is limited.

Question 17

Turbellarians are the only

Accepted Answer

A)  free-living flatworms. 
B)  flatworms to have flame cells for excretion. 
C)  flatworms that are dioecious. 
D)  None of the answers are correct. 
E)  All of the answers are correct. 
A)  free-living flatworms. 
B)  flatworms to have flame cells for excretion. 
C)  flatworms that are dioecious. 
D)  None of the answers are correct. 
E)  All of the answers are correct.

Question 18

A researcher wants to publish the findings of the discovery of a new animal species and hands a draft manuscript to you to critique. The author lists several basic features of the organism which are listed below; which of the features is incorrect?

Accepted Answer

A)  The animal develops via ontogeny. 
B)  The animal has a bilateral symmetry. 
C)  The animal is multicellular. 
D)  The animal is an autotroph. 
E)  The animal is diploid. 
A)  The animal develops via ontogeny. 
B)  The animal has a bilateral symmetry. 
C)  The animal is multicellular. 
D)  The animal is an autotroph. 
E)  The animal is diploid.

Question 19

Absence of a coelom in the phylum Platyhelminthes

Accepted Answer

A)  is seen to be a primitive feature. 
B)  limits the amount of organ specialisation possible. 
C)  means that there is no perivisceral cavity. 
D)  means there is no body cavity between the mesoderm and the endoderm. 
E)  All of the answers are correct. 
A)  is seen to be a primitive feature. 
B)  limits the amount of organ specialisation possible. 
C)  means that there is no perivisceral cavity. 
D)  means there is no body cavity between the mesoderm and the endoderm. 
E)  All of the answers are correct.

Question 20

Which of the following statements about cestodes is CORRECT?

Accepted Answer

A)  Some cestodes are tissue parasites of vertebrates but have an intermediate invertebrate host. 
B)  The tegument of cestodes is highly permeable and is the only means of food uptake. 
C)  Tapeworms are similar in features to platyhelminths, with suckers to attach to the host and a growth zone that buds off body segments 
D)  Cestodes are ectoparasitic flukes with a complex life cycle involving two hosts. 
E)  Cestodes resemble platyhelminths in that they have a flattened body and a ciliated epidermis. 
A)  Some cestodes are tissue parasites of vertebrates but have an intermediate invertebrate host. 
B)  The tegument of cestodes is highly permeable and is the only means of food uptake. 
C)  Tapeworms are similar in features to platyhelminths, with suckers to attach to the host and a growth zone that buds off body segments 
D)  Cestodes are ectoparasitic flukes with a complex life cycle involving two hosts. 
E)  Cestodes resemble platyhelminths in that they have a flattened body and a ciliated epidermis.

Exam 39: Simple Animals: Sponges to Flatworms

Which is NOT a feature of the proglottids of cestodes?

Where does the anus form in deuterostomes?

Flatworms have specialised cells for excretion called

Differences between protostomes and deuterostomes are first evident at

Which Phylum could be described as acoelomate, bilaterally symmetrical and protostome?

The main difference between eumetazoans and parazoans is that

Which class of cnidarians never have a medusa stage in their life cycle?

Amoebocytes in sponges are described as totipotent because of their ability to

Based on molecular data, the Platyhelminthes are grouped in which major clade?

Ctenophorans are thought to be related to cnidarians because

Animals in phylum Nemertea are called proboscis worms because they have a distinctive

It is believed that metazoans could have evolved from

Which layer is NOT present in the body wall of a cnidarian?

Despite often living in the bladder, why is the blood fluke, Schistosoma, not easily washed out of its host?

A consequence of the absence of a coelom in platyhelminths is that

Turbellarians are the only

A researcher wants to publish the findings of the discovery of a new animal species and hands a draft manuscript to you to critique. The author lists several basic features of the organism which are listed below; which of the features is incorrect?

Absence of a coelom in the phylum Platyhelminthes

Which of the following statements about cestodes is CORRECT?

Nature of Molecules

Biomolecules

The Chemistry of Life

Functioning Cells

Movement Across Membranes

Harvesting Energy

Cells, Tissues and Signals

Cell Division

Inheritance

Genes, Chromosomes and Dna

The Genetic Code

Gene Expression

Genomes, Mutation and Cancer

Viruses

Genetic Engineering and Biotechnology

Reproduction, Growth and Development of Flowering Plants

Structure of Plants

Plant Nutrition, Transport and Adaptation to Stress

Plant Hormones and Growth Responses

Animal Reproduction

Animal Development

Homeostasis: Water, Solutes and Excretion

Gas Exchange in Animals

Circulation

Metabolism, Temperature Regulation and Environmental Stress

Animal and Human Nutrition

Innate Defences and the Immune System

Hormonal Control in Animals

Nervous Systems

Animal Movement

Animal Behaviour

Evolving Life

Evolving Earth

Mechanisms of Evolution

Bacteria

The Protists

Plants

Fungi

Annelids, Molluscs, Nematodes and Arthropods

Echinoderms and Chordates

Australian Biota

Population Ecology

Living in Communities

Ecosystems

Human Impacts

Filters