Multiple Choice Questions

Advertisement

Thigmotaxis is not shown by

  • Paramecium

  • Amoeba

  • Ascaris

  • Hydra


C.

Ascaris

Ascaris do not show thigmotaxis.


Amoeba shows thigmotaxis. On coming in contact with a solid object Amoeba generally avoid it by moving in a different by forming pseudopodia.


Hydra is known to respond to a variety of stimuli, both external and internal. On contact with a solid object other than a prey, the whole body usually contracts rather rapidly.

On contact with a hard solid object Paramecium induces avoiding response.


Advertisement

Nucleic acid is absent in

  • Virus

  • Viroid

  • Prion

  • Mycoplasma


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

  • Capsid

  • Protein

  • Envelope

  • Ribosome


Entamoeba histolytica differs from Amoeba in absence of 

  • pseudopodia

  • contractile vacuole

  • nucleus

  • ectoplasm


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

  • Psilotum

  • Rhynia

  • Lycopodium

  • Selaginella


Advertisement

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

  • transformation

  • conjugation

  • translocation

  • transduction


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

  • Monera

  • Protista

  • Animalia

  • Fungi


Polyp phase is absent in

  • Hydra

  • Aurelia

  • Physalia

  • Obelia


Contractile vacuole in protozoan Amoeba is meant for

  • respiration

  • excretion

  • locomotion

  • osmoregulation


Advertisement
<

Edible part of mushroom is

  • basidiocarp

  • secondary mycelium

  • primary mycelium

  • tertiary mycelium


Advertisement