Q How do amoebae, paramecia and trichomonas respectively move?
Amoebae move by amoeboid movements small invaginations and projections of their plasma membrane (pseudopods) that alter the external morphology of the cell making it move on surfaces. Paramecia have the external face of their plasma membrane covered by cilia that flap helping the cell to move. Trichomonas are flagellated protozoans that is they have relatively long filaments outside the cell that beat and make possible active swimming in fluid environments.