Question # 1

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

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

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

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

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obelia

aurelia

Actinia

Taenia

Triploblastic is the characteristic of phylum

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Nematoda

Nemerteans

Platyhelminths

Annelida

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

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 of the following phyla are not pseudocoelomate?

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Acanthocephala

Rotifera

Polychaeta

Nematoda

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

The mantle of most mollusks

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is modified for locomotion

is used in attracting prey

secretes the shell

supports the radula

Radiolarians and heliozoans are members of

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Phylum Apicomplexa

Phylum Sarcomastigophora

Phylum Acetospora

Phylum Ciliophora

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

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

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

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Viruses

Archaea

bacteria

None of above

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

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mantle

shell

visceral mass

head-foot

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

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two

three

four

five

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

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True

False

none of the above

A mosquito is necessary for development of Trichinella spiralis

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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

The excretory product in protozoa is primarily

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Urea

Ammonia

Uric acid

None of these

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

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