Question

Suggest a proof that even unicellular organisms like Amoeba respond to stimuli.

Answer 1

Amoeba reacts by bright light. An amoeba often called amoeboid, is a type of unicellular organism which has the ability to alter its shape, primarily by extending and retracting pseudopods.

Amoeba proteus orients in directive illumination and is negative in strong light and probably positive in the very weak light.

Negative orientation is due to inhibition in the formation of pseudopods on the more highly illuminated surface, and this is due to increase in the elastic strength of the plasma gel.