Question # 1

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.

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

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Cladogram

Monogram

Phylogenetic tree

None of above

All are the characteristics of phylum cnidaria except

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Presence of mesoglea

Contain mesenchyme

gastrovascular cavity

contain nematocysts

Coccidians and Plasmodium are the examples of phylum---------.

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Microspora

Acetoospora

Apicomplexa

Myxozoa

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

Primary host for Fasciola hepatica is

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Snail

Sheep

Cattle

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

Cephalopods rely on olfactory senses for detecting prey

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True

False

None of above

Animals of phylum cnidaria are

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Diploblastic

Triploblastic

None of above

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

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Viruses

Archaea

bacteria

None of above

Process during which aschelminths shed their cuticle is called

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moltin (g)

ecdysis

eutely.

both a and b are correct.

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

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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

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 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

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

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Intermediate host

Definitive host

None of above

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

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two

three

four

five

More Classes

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