Question # 1

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

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

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True

False

none of the above

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

The annelid class whose members are mostly marine is

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Hirudinea.

Oligochaeta.

Polychaeta.

Clitellata.

Ctenophorans and Anthozoans lie in

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Bilateral symmetry

Radial Symmetry

Asymmetry

Pentaradial symmetry

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

Scientific name of blood fluke is

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Schistosoma

Taenia solium

Echinocissus granulosus

Clonorchis sinensis

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

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

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less

Large

Both A and B

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

Radiolarians and heliozoans are members of

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Phylum Apicomplexa

Phylum Sarcomastigophora

Phylum Acetospora

Phylum Ciliophora

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

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

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Stigma

Pyrenoid

Euglenoid

None of 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

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

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

Intermediate host for fish tape worm is

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Pig

Copepod

Snail

Humans

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

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mantle

shell

visceral mass

head-foot

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

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Microspora

Acetoospora

Apicomplexa

Myxozoa

Process during which aschelminths shed their cuticle is called

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moltin (g)

ecdysis

eutely.

both a and b are correct.

--------------- 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

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