Animal Kingdom

Multiple Choice Questions

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Which cells are found only in sponges?

  • Amoeboid cells

  • Choanocytes

  • Pigment cells

  • Gland cells

B.

Choanocytes

Choanocytes are found only in sponges. The choanocyte is an ovoid cell with free ends bearing a transparent contractile collar. The collar surrounds a single, long flagellum. Choanocytes are used in feeding and for ensuring flow of water within the animal's body.

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    Which of the following assists in the locomotion of the organism stated

    • Epithelium of' Pheretima

    • Trichocysts of Paramecium

    • Pedicellaria of Star fish

    • Posterior sucker of Hirudinaria 

    Answer

    The red colour of 'red sea' is due to which of the following blue-green algae?

    • Chlamydomonas nivalis

    • Anabaena

    • Microcystis

    • Trichodesmium

    Answer

    A definite number of segments are found in

    • slug

    • earthworm

    • leech

    • tapeworm

    Answer

    Third cleavage of frog's development is

    • equatorial

    • vertical

    • latitudinal

    • none of these

    Answer
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    What is left when bath sponges dries up

    • Spicules

    • Spongin fibres

    • Tentacles

    • Holdfast

    Answer

    Which of the following is not an insect?

    • Locust

    • Lepisma

    • Termites

    • Spider

    Answer

    The scientist, who described the birds as glorified reptiles, was

    • Romer

    • Huxley

    •  Mendel

    • Robert Hooke

    Answer

    In frog, the vertebra with an anterior convex surface (i.e., double convexties) is

    • atlas

    • urostyle

    • 8th vertebra

    • 9th vertebra

    Answer
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    The main excretory organ of prawn is

    • green gland

    • flame cell

    • Malphigian tubule

    • nephridia

    Answer
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