The alveolar nature of protoplasm was suggested by Butchlli in 1892. According to him, protoplasm consists of many suspended droplets or alveoli or minute bubbles, resembling the foams of emulsion.
. Alveolar theory:The alveolar nature of protoplasm was suggested by Butchlli in 1892. According to him, protoplasm consists of many suspended droplets or alveoli or minute bubbles, resembling the foams of emulsion.