Question # 1

A mosquito is necessary for development of Trichinella spiralis

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True

False

none of the above

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

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Paramyxa

Vorticella

Paramecium

Balantidium

Which of the following is not an external feature of a rotifer?

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cilia

corona

germovitellarium

foot

Characteristics of the phylum Rotifera include all of the following except

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a well-developed cuticle

absence of protonephridia

parthenogenesis is common

triploblastic, bilateral, unsegmented, pseudocoelomate.

Most marine protozoa have solute concentration ------------ to that of their environment

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Hypertonic

Hypotonic

similar

The annelid class whose members are mostly marine is

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Hirudinea.

Oligochaeta.

Polychaeta.

Clitellata.

Nematodes live in both aquatic and terrestrial environments

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True

False

none of the above

A specialized region analogous to mouth called cytopharynx is present in group

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Polycheate

Ctenophora

Protista

Porifera

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

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.

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

Most polychaetes are

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Monoecious.

Dioecious.

Protandric.

Asexual.

------------ depict a sequence in the origion of derived characters

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Cladogram

Monogram

Phylogenetic tree

None of above

The mantle of most mollusks

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is modified for locomotion

is used in attracting prey

secretes the shell

supports the radula

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

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

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

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True

False

none of the above

Earthworms belong to the annelid subclass

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Hirudinea.

Chaetognatha.

Polychaeta.

Oligochaeta.

Radiolarians and heliozoans are members of

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Phylum Apicomplexa

Phylum Sarcomastigophora

Phylum Acetospora

Phylum Ciliophora

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

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