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

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

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Bilateral symmetry

Radial Symmetry

Pentaradial Symmetry

Asymmetr

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

Which of the following is true of the mantel cavity of a bivalve?

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It is the area where water circulates during feeding and gas exchange

It is the space between the mantle and the shell

It is the space between the pericardium and the heart

It is the space where blood circulates before being returned to the heart

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

A clitellum is present in the members of the class Polychaeta is

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Hirudinea.

Polychaeta.

Oligochaeta.

IIirudinea and Oligochaeta

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.

Oligochaetes are

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Monoecious.

Dioecious.

Monoecious dioecious.

asexual.

The major feature which unify aschelminths is

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nervous system.

muscular system.

excretory system.

pseudocoelom.

Which one is not a characteristic habitat of Archaea?

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Acidic environment

Fresh water

High salt

Ocean floor

The majority of rotifers inhabit freshwaters

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True

False

none of the above

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

The annelid class whose members are mostly marine is

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Hirudinea.

Oligochaeta.

Polychaeta.

Clitellata.

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.

------------- harbours the sexual stages of the parasite

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Intermediate host

Definitive host

None of above

A mosquito is necessary for development of Trichinella spiralis

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True

False

none of the above

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

Presence of metameric segmentation

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Lumbricus

Daphnia

Arenicola

Both A and C are correct

A distinctive feature of members of the class Polychaeta is

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Parapodia.

Clitellum.

Annuli.

Absence of setae.

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

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Cladogram

Monogram

Phylogenetic tree

None of above

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