Question # 1

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

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

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True

False

None of Above

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.

Primary host for Fasciola hepatica is

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Snail

Sheep

Cattle

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

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

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two

three

four

five

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

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Viruses

Archaea

bacteria

None of above

Members of class phytomastigophoreans are

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Dioecious

Monoeious

Both A and B are correct

None of above

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

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True

False

none of the above

Schizogony means

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to emit

to join

to split

None of above

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

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

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True

False

none of the 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

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

The operculum aids in both respiration and reproduction in gastropods

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True

False

None of Above

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

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incomplete digestive tract

a muscular pharynx

constant cell numbers (eutely)

adhesive glands

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

The scientific name of the common pork roundworm is

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Ascaris lumbricoides.

Enterobius vermicularis.

Trichinella spiralis.

Wuchereria bancrofti.

The scientific name of the common pinworm is

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Ascaris lumbricoides.

Enterobius vermicularis

Trichinella spiralis.

Wuchereria bancrofti

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

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True

False

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

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