Question # 1

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

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mantle

shell

visceral mass

head-foot

The scientific name of the common pinworm is

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Ascaris lumbricoides.

Enterobius vermicularis

Trichinella spiralis.

Wuchereria bancrofti

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

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True

False

none of the above

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

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Stigma

Pyrenoid

Euglenoid

None of above

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

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

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Bilateral symmetry

Radial Symmetry

Pentaradial Symmetry

Asymmetr

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

Primary host for Fasciola hepatica is

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Snail

Sheep

Cattle

Both A and B are correct

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

The aschelminthis contain organs for gas exchange and circulation.

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True

False

none of the above

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

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obelia

aurelia

Actinia

Taenia

The operculum aids in both respiration and reproduction in gastropods

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True

False

None of Above

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

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Viruses

Archaea

bacteria

None of above

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

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horsehair

Gordian

round

both a and b are correct

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

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veliger

Kinorhynchs.

Acanthocephalans.

Nemerteans.

Which one is a member of class zoomastigophorea?

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Trichonympha

Trypanosoma

Paramyxa

Giardia

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

The annelid class whose members are mostly marine is

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Hirudinea.

Oligochaeta.

Polychaeta.

Clitellata.

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

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

Nematodes live in both aquatic and terrestrial environments

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True

False

none of the above

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