Amoeba
Amoebae's most recognizable features include one or more nuclei and a simple contractile vacuole to maintain osmotic equilibrium - low water amounts in cell protecting cell from bursting with excess water. Food enveloped by the amoeba is stored and digested in vacuoles. Amoebae, like other unicellular eukaryotic organisms, reproduce asexually via mitosis and cytokinesis, not to be confused with binary fission, which is how prokaryotes (bacteria) reproduce. In cases where the amoeba are forcibly divided, the portion that retains the nucleus will survive and form a new cell and cytoplasm, while the other portion dies. Amoebae also have no definite shape.
Osmoregulation [ editar ]
Como a maioria dos protistas, ameba tem um vacúolo contrátil . Amoeba proteus , uma vida livre, espécies de água doce de ameba, tem um vacúolo contrátil (CV), que é uma membrana ligada à organela . O CV enche lentamente com água a partir do citoplasma (diástole), e, enquanto a fusão com a membrana celular, que