Biological Classification

Multiple Choice Questions

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Contractile vacuole in protozoan Amoeba is meant for

  • respiration

  • excretion

  • locomotion

  • osmoregulation

D.

osmoregulation

Contractile vacuole is the clear rounded, pulsating body present in the posterior part of endoplasm of Amoeba. Found only in fresh water and is concerned by osmoregulation, ie, removal of excess of water.

Plasmalemma is a trilaminar and selectively permeable membrane covering the body functions both in excretion and respiration in Amoeba.

Pseudopodia are finger like and blunt extensions of cell body in protozoans. It is a temporary locomotory structure also used for feeding in Amoeba.

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    Most primitive member, in which roots are not present, is

    • Psilotum

    • Rhynia

    • Lycopodium

    • Selaginella

    Answer

    Which part of an animal virus is not reproduced in multiple copies?

    • Capsid

    • Protein

    • Envelope

    • Ribosome

    Answer

    Nucleic acid is absent in

    • Virus

    • Viroid

    • Prion

    • Mycoplasma

    Answer

    Thigmotaxis is not shown by

    • Paramecium

    • Amoeba

    • Ascaris

    • Hydra

    Answer
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    The process which cannot take place in the absence of viruses is

    • transformation

    • conjugation

    • translocation

    • transduction

    Answer

    Edible part of mushroom is

    • basidiocarp

    • secondary mycelium

    • primary mycelium

    • tertiary mycelium

    Answer

    Entamoeba histolytica differs from Amoeba in absence of 

    • pseudopodia

    • contractile vacuole

    • nucleus

    • ectoplasm

    Answer

    In Whittaker's system of classification, prokaryotes belong to the kingdom

    • Monera

    • Protista

    • Animalia

    • Fungi

    Answer
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    Polyp phase is absent in

    • Hydra

    • Aurelia

    • Physalia

    • Obelia

    Answer
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