Multiple Choice Questions

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What is left when bath sponges dries up

  • Spicules

  • Spongin fibres

  • Tentacles

  • Holdfast


B.

Spongin fibres

Euspongia is called bath spongia. The sponge are classified on the basis of skeleton which is made up of spongin fibere. After the bath sponge dries only the skeleton is left.


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

  • Chlamydomonas nivalis

  • Anabaena

  • Microcystis

  • Trichodesmium


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

  • atlas

  • urostyle

  • 8th vertebra

  • 9th vertebra


The main excretory organ of prawn is

  • green gland

  • flame cell

  • Malphigian tubule

  • nephridia


A definite number of segments are found in

  • slug

  • earthworm

  • leech

  • tapeworm


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Third cleavage of frog's development is

  • equatorial

  • vertical

  • latitudinal

  • none of these


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

  • Romer

  • Huxley

  •  Mendel

  • Robert Hooke


Which of the following is not an insect?

  • Locust

  • Lepisma

  • Termites

  • Spider


Which cells are found only in sponges?

  • Amoeboid cells

  • Choanocytes

  • Pigment cells

  • Gland cells


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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 


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