formation of pseudopodia.

• Many theories have been given for the formation of pseudopodia.

1. Contraction theory – Proposed by Schultuz.
2. Walking theory – Given by Dellinger.
3. Rolling movement theory – Given by Jenning by doing experiment on A. verucosa using charcoal.
4. Surface Tension theory – Given by Berthold. The point where surface tension is low, pseudopodia is formed.
5. Adhesion theory – Given by Jenning amoeba moves like drop of water.
6. Fountain zone theory – Given by Allen.
7. Folding and unfolding theory – Given by Goldacre and Lorch.
8. Hydraulic pressure theory – Given by Renoldi and Jaun.
9. Sol–gel theory – Given by Hyman.