Which insect is useful for us ? from Biology Animal Kingdom

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 Multiple Choice QuestionsMultiple Choice Questions

251.

The excretory material of bony fish is:

  • urea

  • protein

  • ammonia

  • amino acid


252.

Food storage in Leucosolenia occur by :

  • ostia

  • osculum

  • thesocyte

  • spongocoel


253.

Class Crustacea differ from Insecta in having:

  • two pairs of antennae

  • jointed foot

  • chitinous cuticle

  • none of these


254.

Which of the following character is presence essentialy in chordates ?

  • Ventral spinal chord

  • Dorsal heart

  • Pharyngeal gill slits

  • Blood flow in forward direction in ventral blood vessels


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255.

Which insect is useful for us ?

  • Periplaneta

  • Musca

  • Bombyx

  • Mosquitoes


C.

Bombyx

Bombay mori is a silk producing insect which is reared on mulberry leaves for commercial production of silk. Whereas Mosquito, Musca and Periplanata are harmful Arthropodes.


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256.

Which of the following is not found in Hydra ?

  • Epithelio-muscular cells

  • Cnidocyte

  • Choanocyte

  • Nerve cells


257.

Which of the following symmetry is found in adult sea-anemone ?

  • Radial

  • Biradial

  • Bilateral

  • Spherical


258.

Body cavity of adult Ascaris is :

  • haemocoel

  • amphicoel

  • pseudocoel

  • schizocoel


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259.

All worms are :

  • triploblastic

  • segmented

  • endo-parasites

  • free - living


260.

Pearl oyster is a mollusc which belongs to class :

  • Cephalopoda

  • Pelecypoda

  • Scaphopoda

  • Gastropoda


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