Question # 1

Members of class phytomastigophoreans are

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Dioecious

Monoeious

Both A and B are correct

None of above

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

Most polychaetes are

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Monoecious.

Dioecious.

Protandric.

Asexual.

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

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

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Bilateral symmetry

Radial Symmetry

Pentaradial Symmetry

Asymmetr

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

The majority of rotifers inhabit freshwaters

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True

False

none of the above

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

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veliger

Kinorhynchs.

Acanthocephalans.

Nemerteans.

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.

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

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

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

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Stigma

Pyrenoid

Euglenoid

None of above

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

A distinctive feature of members of the class Polychaeta is

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Parapodia.

Clitellum.

Annuli.

Absence of setae.

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

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True

False

none of the above

Presence of metameric segmentation

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Lumbricus

Daphnia

Arenicola

Both A and C are correct

All are the characteristics of phylum cnidaria except

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Presence of mesoglea

Contain mesenchyme

gastrovascular cavity

contain nematocysts

Oligochaetes are

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Monoecious.

Dioecious.

Monoecious dioecious.

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

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

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

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