Question
Biology Question on biological classification
Movements by pseudopodia of Amoeba are due to change in
A
pressure
B
atmosphere
C
temperature
D
viscosity.
Answer
viscosity.
Explanation
Solution
Movement by pseudopodia is possible only over a surface. It depends upon active contraction of the ectoplasm (plasmagel) at the posterior end of the body. This leads the endoplasm (plasmasol) to flow forward into the expanding pseudopodium. This process involves continuous solation at the posterior end and gelation at the anterior end. This is called sol gel or change of viscosity theory, advanced by Mast and Pantin.