Animal Kingdom

Multiple Choice Questions

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Shell of molluscs is derived from

  • foot

  • mantle

  • ctenidia

  • placoid

B.

mantle

Molluscs are the soft bodied, unsegmented animals covered by a shell. Mantle is the dorsal body wall which covers the organs of digestion, reproduction and movement. In between the shell and body wall is a covering called mantle, which secretes the shell.

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    Tuberllarians are free living

    • nematodes

    • cestodes

    • flat worms

    • trematodes

    Answer

    In sea anemone, the symmetry is

    • radial

    • bilateral

    • spherical

    • absent

    Answer

    The characteristic larva of Phylum- 'Coelenterata' is

    • planula

    • cysticercus

    • rhabdiform

    • wriggler

    Answer

    The excretory material of bony fish is

    • urea

    • protein

    • ammonia

    • amino acid

    Answer
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    The intermediate host of Schistosoma is

    • Snail

    • mosquito

    • housefly

    • sheep

    Answer

    Moulting hormone is secreted by

    • corpora cardacum

    • corpora allata

    • neurosecretory hormone

    • prothoracic gland

    Answer

    In Mollusca, eye is present over a stalk, called

    • ostracum

    • operculum

    • ommatophores

    • osphradium

    Answer

    Solenocytes are associated with

    • respiration

    • digestion

    • excretion

    • nutrition

    Answer
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    Connecting link between annelids and molluscs is

    • Neopilina

    • Peripatus

    • Periplaneta

    • Limulus

    Answer
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