0 A unicellular organism is made of only one cell:
Most algae are unicellular.
1 describes a living thing that is made of only one cell
In particular, a unicellular organism corrects direction of its own motion reacting to changes in the environment.
Sponges have no nervous systems at all and hence no individuality in the sense that ordinary unicellular and multicellular organisms are individuals.
Bacteria are frequently said to be typical unicellular organisms.
Three papers review important areas in unicellular complexity.
On the basis of their dimensions and morphological considerations, the sphaeromorph acritarchs are interpreted as probably representing the resistant, reproductive cysts of unicellular protists.
Unicellular organisms may respond by using complex taxis.
Permanent gross leakage, which may result from imbibitional stress, inevitably leads to cell death in unicellular organisms.
All zones are produced by filamentous fungi (mycobionts) and unicellular green algae (phycobionts), which together form a symbiotic lichen association.
