Online Test

Question # 1

Oligochaetes are

Choose an answer

Monoecious.

Dioecious.

Monoecious dioecious.

asexual.

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

Choose an answer

A ventral cord

A complete digestive tract

Metamerism

An exoskeleton

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

Choose an answer

Bilateral symmetry

Radial Symmetry

Pentaradial Symmetry

Asymmetr

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

Choose an answer

True

False

none of the above

All are the characteristics of phylum cnidaria except

Choose an answer

Presence of mesoglea

Contain mesenchyme

gastrovascular cavity

contain nematocysts

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

Choose an answer

horsehair

Gordian

round

both a and b are correct

Molluscs can be characterized by:

Choose an answer

Trochophore larvae, and they are deuterostomes.

Planaria larvae, and they are protostomes.

Trochophore larvae and they are protostomes.

Planaria larvae, and they are deuterostomes

A distinctive feature of members of the subclass Hirudinea is

Choose an answer

Parapodia.

Tentacles.

Anterior and Posterior suckers.

Palps.

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

Choose an answer

cilia

corona

germovitellarium

foot

Which of the following phyla are not pseudocoelomate?

Choose an answer

Acanthocephala

Rotifera

Polychaeta

Nematoda

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

Choose an answer

Hypertonic

Hypotonic

similar

Ctenophorans and Anthozoans lie in

Choose an answer

Bilateral symmetry

Radial Symmetry

Asymmetry

Pentaradial symmetry

The operculum aids in both respiration and reproduction in gastropods

Choose an answer

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

Choose an answer

Protostyle

Umbo

Crystalline style

Gastric shield

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

Choose an answer

Single type of nucleus

Have resistant spores

Apical complex for penetrating host cells

No cilia and flagella

Presence of metameric segmentation

Choose an answer

Lumbricus

Daphnia

Arenicola

Both A and C are correct

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

Choose an answer

pseudocoelom

adhesive glands

cuticle

none of the above

Scientific name of fish tape worm is

Choose an answer

Clonorchis sinensis

Schistosoma

Diphyllobothrium latum

Fasciola hepatica

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

Choose an answer

Most nematodes are dioecious

Most nematodes are dimorphic

Males are larger than the females

Gonads lie free in the pseudocoelom.

Which one is not a characteristic habitat of Archaea?

Choose an answer

Acidic environment

Fresh water

High salt

Ocean floor

Intermediate host for fish tape worm is

Choose an answer

Pig

Copepod

Snail

Humans

Triploblastic is the characteristic of phylum

Choose an answer

Nematoda

Nemerteans

Platyhelminths

Annelida

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

Choose an answer

Intermediate host

Definitive host

None of above

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

Choose an answer

Eight

Six

Five

Seven

The aschelminths are seven phyla grouped only for convenience.

Choose an answer

True

False

none of the above

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

Choose an answer

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

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

Choose an answer

Microspora

Acetoospora

Apicomplexa

Myxozoa

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

Choose an answer

True

False

none of the above

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

Choose an answer

True

False

none of the above

The annelid class whose members are mostly marine is

Choose an answer

Hirudinea.

Oligochaeta.

Polychaeta.

Clitellata.

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

Choose an answer

Mitotic

Meiotic

Multiple mitotic

First mitotic then meiotic

The mantle of most mollusks

Choose an answer

is modified for locomotion

is used in attracting prey

secretes the shell

supports the radula

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

Choose an answer

Intermediate

Primary host

Definitive host

Both A and C are correct

Characteristics of the phylum Rotifera include all of the following except

Choose an answer

a well-developed cuticle

absence of protonephridia

parthenogenesis is common

triploblastic, bilateral, unsegmented, pseudocoelomate.

Schizogony means

Choose an answer

to emit

to join

to split

None of above

Where would you look for a kinorhynch?

Choose an answer

a marine environment

a freshwater environment

on land that is relatively moist

on land that is relatively dry

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

Choose an answer

It contains the gills

It secretes the shell

It is used in locomotion

It contains gonads and digestive glands

The scientific name of the common pinworm is

Choose an answer

Ascaris lumbricoides.

Enterobius vermicularis

Trichinella spiralis.

Wuchereria bancrofti

The scientific name of the common pork roundworm is

Choose an answer

Ascaris lumbricoides.

Enterobius vermicularis.

Trichinella spiralis.

Wuchereria bancrofti.

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

Choose an answer

Arcella

Ameoba proteus

polystomella

Difflugia

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

Choose an answer

Gastrulation

Epiboly

Involution

Torsion

The majority of rotifers inhabit freshwaters

Choose an answer

True

False

none of the above

Most polychaetes are

Choose an answer

Monoecious.

Dioecious.

Protandric.

Asexual.

Which one is a member of class zoomastigophorea?

Choose an answer

Trichonympha

Trypanosoma

Paramyxa

Giardia

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

Choose an answer

water tube

incurrent opening

suprabranchial chamber

pericardial cavity

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

Choose an answer

evolutionary systematic

Phylogenetic systematic

Numarical taxonomy

Both A and C

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

Choose an answer

Cladogram

Monogram

Phylogenetic tree

None of above

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

Choose an answer

obelia

aurelia

Actinia

Taenia

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

Choose an answer

veliger

Kinorhynchs.

Acanthocephalans.

Nemerteans.

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

Choose an answer

Viruses

Archaea

bacteria

None of above

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

Choose an answer

Stigma

Pyrenoid

Euglenoid

None of above

Polymorphism is characteristic of phylum

Choose an answer

phylum Nematoda

phylum Annelida

phylum Cnidaria

None of above

All the following characteristics are present in Dephnia except

Choose an answer

Carapace covers thorax

One pair of compoynd eyes

Presence of parapodia

Eight pairs of thoracic appendages

Arenicola is an example of class

Choose an answer

Oligocheata

Polycheata

Hirudinea

None of above

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

Choose an answer

Homologous characters

Derived characters

Synapomorphies

Both B and C

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

Choose an answer

Typhlosole

Seminal vesicle

Nephridium

Chloragogen tissue

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

Choose an answer

Pellicle

mesosomes

peroxisomes

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?

Choose an answer

Scaphopoda

Bivalvia

Polyplacophora

Gastropoda

A mosquito is necessary for development of Trichinella spiralis

Choose an answer

True

False

none of the above

Radiolarians and heliozoans are members of

Choose an answer

Phylum Apicomplexa

Phylum Sarcomastigophora

Phylum Acetospora

Phylum Ciliophora

Animals of phylum cnidaria are

Choose an answer

Diploblastic

Triploblastic

None of above

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

Choose an answer

Visceral mass

head-foot

mantle cavity

radula

Members of class phytomastigophoreans are

Choose an answer

Dioecious

Monoeious

Both A and B are correct

None of above

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

Choose an answer

Paramyxa

Vorticella

Paramecium

Balantidium

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

Choose an answer

True

False

None of Above

The excretory product in protozoa is primarily

Choose an answer

Urea

Ammonia

Uric acid

None of these

Most triploblastic animals have an

Choose an answer

tissue system level of organization

colonial level of organization

organ system level of organization

both A and B are correct

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

Choose an answer

True

False

None of above

The major feature which unify aschelminths is

Choose an answer

nervous system.

muscular system.

excretory system.

pseudocoelom.

Following are the chharacteristics of phylum Annelida except

Choose an answer

Distinct head

parapodia

Hermaphrodite

Thoracic appendages

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

Choose an answer

less

Large

Both A and B

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

Choose an answer

Hirudinea.

Polychaeta.

Oligochaeta.

IIirudinea and Oligochaeta

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

Choose an answer

Polycheate

Ctenophora

Protista

Porifera

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

Choose an answer

It is used in reproduction

It is used in excretion

It is used in rasping food

It is used in gas exchange

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

Choose an answer

two

three

four

five

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

Choose an answer

True

False

None of Above

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

Choose an answer

incomplete digestive tract

a muscular pharynx

constant cell numbers (eutely)

adhesive glands

The aschelminthis contain organs for gas exchange and circulation.

Choose an answer

True

False

none of the above

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

Choose an answer

Hirudinea

IIirudinea and Oligochaeta

Polychaeta

Polychaeta and Oligochaeta

Animals of phylum cnidaria can be found in

Choose an answer

Aquatic environment

Marine environment

Dry and harsh environment

Both A and B are correct

A distinctive feature of members of the class Polychaeta is

Choose an answer

Parapodia.

Clitellum.

Annuli.

Absence of setae.

Scientific name of blood fluke is

Choose an answer

Schistosoma

Taenia solium

Echinocissus granulosus

Clonorchis sinensis

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

Choose an answer

Aplacophora

Polyplacophora

Monoplacophora

Cephalopoda

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

Choose an answer

Hearts

Dorsal and ventral blood vessels

Seminal vesicles

The typhlosole.

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

Choose an answer

mantle

shell

visceral mass

head-foot

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

Choose an answer

True

False

None of Above

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

Choose an answer

R. M. Kristensen

Carolus Linnaeus

Rebert II. Whittaker

None of above

Earthworms belong to the annelid subclass

Choose an answer

Hirudinea.

Chaetognatha.

Polychaeta.

Oligochaeta.

Primary host for Fasciola hepatica is

Choose an answer

Snail

Sheep

Cattle

Both A and B are correct

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

Choose an answer

Siphon.

Pneumostome.

Umbo.

Operculum

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

Choose an answer

True

False

None of Above

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

Choose an answer

Pariapulida

Acanthocephala

Loricifera

Nematomorpha

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

Choose an answer

triploblastic, bilateral, vermiform

cuticles are not shed

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

body wall has only longitudinal

Nematodes live in both aquatic and terrestrial environments

Choose an answer

True

False

none of the above

Process during which aschelminths shed their cuticle is called

Choose an answer

moltin (g)

ecdysis

eutely.

both a and b are correct.

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.

Choose an answer

True

False

None of Above

The molluscs are most closely related to the

Choose an answer

Annelids

Enhinoderms

Arthropods.

Chordates

Cephalopods rely on olfactory senses for detecting prey

Choose an answer

True

False

None of above