Multiple Choice Questions

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The intermediate host of Schistosoma is

  • Snail

  • mosquito

  • housefly

  • sheep


A.

Snail

Schistosoma mansoni is the common human blood fluke. It belongs to class- Trematoda of Platylhelminthes. Blood fluke is digentic, primary host is man and secondary host id snail.


Sheep is the primary host of Fasciola hepatics (sheep liver fluke), causing 'liver rot'. Its secondary host is also the snail.


Mosquito and housefly are not found to be the intermediate host of any animal.


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Shell of molluscs is derived from

  • foot

  • mantle

  • ctenidia

  • placoid


Tuberllarians are free living

  • nematodes

  • cestodes

  • flat worms

  • trematodes


The excretory material of bony fish is

  • urea

  • protein

  • ammonia

  • amino acid


In sea anemone, the symmetry is

  • radial

  • bilateral

  • spherical

  • absent


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Connecting link between annelids and molluscs is

  • Neopilina

  • Peripatus

  • Periplaneta

  • Limulus


In Mollusca, eye is present over a stalk, called

  • ostracum

  • operculum

  • ommatophores

  • osphradium


The characteristic larva of Phylum- 'Coelenterata' is

  • planula

  • cysticercus

  • rhabdiform

  • wriggler


Moulting hormone is secreted by

  • corpora cardacum

  • corpora allata

  • neurosecretory hormone

  • prothoracic gland


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Solenocytes are associated with

  • respiration

  • digestion

  • excretion

  • nutrition


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