Question

Differentiate between excretion ands osmoregulation? Describe how excretion takes place in amoeba.

Answer 1

excretion is the process of removing toxic substances from the body 
while
osmoregulation is the homeostatic regulation of osmotic pressure in the body in order to maintain a constant water content
excretion in amoeba takes place through its skin .the left over waste is thrown out of body

Answer 2

Excretion is a process of removing waste materials from the body which are produced in a result of metabolic activities in body whereas osmoregulation is the process o maintaining osmotic pressure inside the body.

In amoeba, the process of excretion takes place by diffusion through the body surface. The waste materials include carbon dioxide and ammonia move from cytoplasm to contractile vacuoles which moves close to the boundary and excrete them in the environment.