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Biological Classification

Multiple Choice Questions

121.

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

Monera
Protista
Animalia
Fungi

122.

Thigmotaxis is not shown by

Paramecium
Amoeba
Ascaris
Hydra

123.

Polyp phase is absent in

Hydra
Aurelia
Physalia
Obelia

124.
Contractile vacuole in protozoan Amoeba is meant for

respiration

excretion

locomotion

osmoregulation

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.