Online Test

Question # 1

Members of the gastropod subclass Pulmonata are predominantly freshwater or terrestrial. Their mantle is modified into a lung, which opens to the outside of the mantle cavity through a/an

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Siphon.

Pneumostome.

Umbo.

Operculum

Animals of phylum cnidaria are

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Diploblastic

Triploblastic

None of above

Coccidians and Plasmodium are the examples of phylum---------.

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Microspora

Acetoospora

Apicomplexa

Myxozoa

As protozoa are small, they have --------- surface area in proportion to their volume

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less

Large

Both A and B

Members of the class Polyplacophora include the chitons, which are found on hard substrates in marine habitats.

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True

False

None of above

A ------------- is a mucoid mass that extends to the stomach of gastropods. It contains trapped food particles and is rotated by cilia

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Protostyle

Umbo

Crystalline style

Gastric shield

No free living larval forms occur in the annelid subclass(es)

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Hirudinea

IIirudinea and Oligochaeta

Polychaeta

Polychaeta and Oligochaeta

In Schizogony ----------- divisions takes place in mature individual

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Mitotic

Meiotic

Multiple mitotic

First mitotic then meiotic

Members of the class Monoplacophora are wormlike molluscs that lack a shell, crystalline style, and foot; they live in vertical burrows on the deep-sea floor.

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True

False

None of Above

Which of the following is not an external feature of a rotifer?

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cilia

corona

germovitellarium

foot

The diversity of body forms and lifestyles present in the phylum Mollusca is an excellent example of adaptive radiation

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True

False

None of Above

Of the following, which is the most recently described pseudocoelomate animal phylum?

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Pariapulida

Acanthocephala

Loricifera

Nematomorpha

Which of the following is true of the radula of most molluscs?

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It is used in reproduction

It is used in excretion

It is used in rasping food

It is used in gas exchange

A regular arrangement of microtubules called --------- underlies the plasma membrane of many protozoa

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Pellicle

mesosomes

peroxisomes

Both A and B are correct

Process during which aschelminths shed their cuticle is called

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moltin (g)

ecdysis

eutely.

both a and b are correct.

The ------------- is a site of amino acid metabolism in an earthworm and is analogous to the vertebrate liver.

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Typhlosole

Seminal vesicle

Nephridium

Chloragogen tissue

A specialized region analogous to mouth called cytopharynx is present in group

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Polycheate

Ctenophora

Protista

Porifera

--------------- are the characters that have arisen since common ancestory with the group

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Homologous characters

Derived characters

Synapomorphies

Both B and C

Scientific name of blood fluke is

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Schistosoma

Taenia solium

Echinocissus granulosus

Clonorchis sinensis

Most marine protozoa have solute concentration ------------ to that of their environment

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Hypertonic

Hypotonic

similar

Radiolarians and heliozoans are members of

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Phylum Apicomplexa

Phylum Sarcomastigophora

Phylum Acetospora

Phylum Ciliophora

The excretory product in protozoa is primarily

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Urea

Ammonia

Uric acid

None of these

The scientist who describe a system of classification that distinguished between kingdoms according to cellular organization and mode of nutrition was

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R. M. Kristensen

Carolus Linnaeus

Rebert II. Whittaker

None of above

Presence of metameric segmentation

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Lumbricus

Daphnia

Arenicola

Both A and C are correct

Which of the following is a distinct feature that occurs in all pseudocoelomate phyla?

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pseudocoelom

adhesive glands

cuticle

none of the above

Earthworms belong to the annelid subclass

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Hirudinea.

Chaetognatha.

Polychaeta.

Oligochaeta.

Annelids and Arthropods share all of the following characteristics except one. Select the exception.

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A ventral cord

A complete digestive tract

Metamerism

An exoskeleton

Nematodes live in both aquatic and terrestrial environments

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True

False

none of the above

The Gastropoda and the Cephalopoda form a clade characterized by a dorsoventrally elongate body and shell coiling.

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True

False

None of Above

A mosquito is necessary for development of Trichinella spiralis

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True

False

none of the above

All are the characteristics of phylum cnidaria except

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Presence of mesoglea

Contain mesenchyme

gastrovascular cavity

contain nematocysts

Schizogony means

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to emit

to join

to split

None of above

Arenicola is an example of class

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Oligocheata

Polycheata

Hirudinea

None of above

Which of the following is true of the mantel cavity of a bivalve?

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It is the area where water circulates during feeding and gas exchange

It is the space between the mantle and the shell

It is the space between the pericardium and the heart

It is the space where blood circulates before being returned to the heart

The major feature which unify aschelminths is

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nervous system.

muscular system.

excretory system.

pseudocoelom.

A clitellum is present in the members of the class Polychaeta is

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Hirudinea.

Polychaeta.

Oligochaeta.

IIirudinea and Oligochaeta

Phylum Rotifera consist of --------- classes.

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two

three

four

five

A distinctive feature of members of the subclass Hirudinea is

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Parapodia.

Tentacles.

Anterior and Posterior suckers.

Palps.

The operculum aids in both respiration and reproduction in gastropods

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True

False

None of Above

Labial palps of bivalves sort filtered food particles delivered by cilia lining the ventral margin of the gills.

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True

False

None of Above

Molluscs can be characterized by:

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Trochophore larvae, and they are deuterostomes.

Planaria larvae, and they are protostomes.

Trochophore larvae and they are protostomes.

Planaria larvae, and they are deuterostomes

The majority of rotifers inhabit freshwaters

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True

False

none of the above

Ascaris lumbricoides is commonly known as the giant intestinal roundworm of humans.

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True

False

none of the above

Triploblastic is the characteristic of phylum

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Nematoda

Nemerteans

Platyhelminths

Annelida

All of the following are characteristics of the phylum nematoda except?

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triploblastic, bilateral, vermiform

cuticles are not shed

complete digestive tract with a mouth surrounded by lips bearing sense organs

body wall has only longitudinal

Which of the following is not true with respect to nematode reproduction?

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Most nematodes are dioecious

Most nematodes are dimorphic

Males are larger than the females

Gonads lie free in the pseudocoelom.

Following are the chharacteristics of phylum Annelida except

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Distinct head

parapodia

Hermaphrodite

Thoracic appendages

A distinctive feature of members of the class Polychaeta is

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Parapodia.

Clitellum.

Annuli.

Absence of setae.

Except ---------------- all are the members of class Lobosea

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Arcella

Ameoba proteus

polystomella

Difflugia

In phytomastigophorean each chloroplast has a structure -------------- which stores and synthesizes polysaccharides.

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Stigma

Pyrenoid

Euglenoid

None of above

Which of the following phyla are not pseudocoelomate?

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Acanthocephala

Rotifera

Polychaeta

Nematoda

All the following are unique to the molluscs except one. Select the exception.

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mantle

shell

visceral mass

head-foot

------------ gave rise to the kingdom protista

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Viruses

Archaea

bacteria

None of above

Characteristics of the phylum Rotifera include all of the following except

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a well-developed cuticle

absence of protonephridia

parthenogenesis is common

triploblastic, bilateral, unsegmented, pseudocoelomate.

Which of the following is true of the visceral mass of a mollusc?

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It contains the gills

It secretes the shell

It is used in locomotion

It contains gonads and digestive glands

All are the characteristics of phylum Apicomplexa except------------------

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Single type of nucleus

Have resistant spores

Apical complex for penetrating host cells

No cilia and flagella

The main propulsive structure(s) in the circulatory system of an earthworm is (are)

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Hearts

Dorsal and ventral blood vessels

Seminal vesicles

The typhlosole.

Which one of the following do not lie in phylum Cnidaria?

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obelia

aurelia

Actinia

Taenia

Water exits the mantle cavity of a bivalve through the ------------ and the excurrent opening

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water tube

incurrent opening

suprabranchial chamber

pericardial cavity

Most triploblastic animals have an

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tissue system level of organization

colonial level of organization

organ system level of organization

both A and B are correct

Number of the phylum Nematomorpha are commonly called the ------------- worms.

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horsehair

Gordian

round

both a and b are correct

Ctenophorans and Anthozoans lie in

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Bilateral symmetry

Radial Symmetry

Asymmetry

Pentaradial symmetry

Cephalopods rely on olfactory senses for detecting prey

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True

False

None of above

Which one of the following do not lie in phylum ciliophora?

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Paramyxa

Vorticella

Paramecium

Balantidium

All the following characteristics are present in Dephnia except

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Carapace covers thorax

One pair of compoynd eyes

Presence of parapodia

Eight pairs of thoracic appendages

The approach which makes hypothesis of geneological relationships among monophyletic groups of organisms is

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evolutionary systematic

Phylogenetic systematic

Numarical taxonomy

Both A and C

Which one is a member of class zoomastigophorea?

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Trichonympha

Trypanosoma

Paramyxa

Giardia

The arrangement of structures in fives around a radial animal is called

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Bilateral symmetry

Radial Symmetry

Pentaradial Symmetry

Asymmetr

Which one is not a characteristic habitat of Archaea?

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Acidic environment

Fresh water

High salt

Ocean floor

All of the following mollusc characters would be found in a member of the class Bivalvia except one. Select the exception.

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Visceral mass

head-foot

mantle cavity

radula

Primary host for Fasciola hepatica is

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Snail

Sheep

Cattle

Both A and B are correct

Where would you look for a kinorhynch?

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a marine environment

a freshwater environment

on land that is relatively moist

on land that is relatively dry

Most polychaetes are

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Monoecious.

Dioecious.

Protandric.

Asexual.

--------------- is a developmental process that occurs in gastropods and results in a 180 degree counterclockwise twisting of the visceral mass and mantle cavity

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Gastrulation

Epiboly

Involution

Torsion

The aschelminthis contain organs for gas exchange and circulation.

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True

False

none of the above

Animals of phylum cnidaria can be found in

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Aquatic environment

Marine environment

Dry and harsh environment

Both A and B are correct

Members of which of the following mollusc classes would be characterized by a reduced head, a mantle that surrounds the entire body and a tusk-shaped shell?

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Scaphopoda

Bivalvia

Polyplacophora

Gastropoda

Members of class phytomastigophoreans are

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Dioecious

Monoeious

Both A and B are correct

None of above

The scientific name of the common pork roundworm is

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Ascaris lumbricoides.

Enterobius vermicularis.

Trichinella spiralis.

Wuchereria bancrofti.

A ----------- is a developmental stage of a freshwater bivalve that is parasitic on fishes

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veliger

Kinorhynchs.

Acanthocephalans.

Nemerteans.

Tsetse files are ------------- host for Trypanosoma brucei, causing sleeping sickness to humans

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Intermediate

Primary host

Definitive host

Both A and C are correct

The scientific name of the common pinworm is

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Ascaris lumbricoides.

Enterobius vermicularis

Trichinella spiralis.

Wuchereria bancrofti

Intermediate host for fish tape worm is

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Pig

Copepod

Snail

Humans

Polymorphism is characteristic of phylum

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phylum Nematoda

phylum Annelida

phylum Cnidaria

None of above

Scientific name of fish tape worm is

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Clonorchis sinensis

Schistosoma

Diphyllobothrium latum

Fasciola hepatica

Elephantiasis is caused by filarial worms (i.e., Wuchereia spp.).

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True

False

none of the above

The molluscs are most closely related to the

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Annelids

Enhinoderms

Arthropods.

Chordates

Members of which of the following mollusc classed would be characterized by a shell consisting of 8 plates?

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Aplacophora

Polyplacophora

Monoplacophora

Cephalopoda

Subkingdom protozoa consist of --------- separate phyla within the kingdom protista.

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Eight

Six

Five

Seven

The mantle of most mollusks

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is modified for locomotion

is used in attracting prey

secretes the shell

supports the radula

Oligochaetes are

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Monoecious.

Dioecious.

Monoecious dioecious.

asexual.

Acanthocephalans are also known as spiny-headed worms because of their spiny

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True

False

none of the above

The aschelminths are seven phyla grouped only for convenience.

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True

False

none of the above

The annelid class whose members are mostly marine is

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Hirudinea.

Oligochaeta.

Polychaeta.

Clitellata.

Which of the following is not a common feature of aschelminth?

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incomplete digestive tract

a muscular pharynx

constant cell numbers (eutely)

adhesive glands

The absence of a shell in the aplacophora is a primitive character in the phylum Mollusca

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True

False

None of Above

------------ depict a sequence in the origion of derived characters

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Cladogram

Monogram

Phylogenetic tree

None of above

------------- harbours the sexual stages of the parasite

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Intermediate host

Definitive host

None of above