Encellighet
Encellighet, or unicellularity, is the condition in which an organism is composed of a single cell that carries out all essential life processes. Most bacteria, archaea, many protists, and several fungi and algae are unicellular, though some species form colonies or transient aggregates without true multicellularity. In unicellular organisms, the entire metabolism, growth, response to the environment, and reproduction occur within one cell.
Cellular organization differs between prokaryotes and eukaryotes. Prokaryotic unicells have no nucleus, their genetic material resides
Reproduction is often asexual, most commonly by binary fission in bacteria and archaea or by budding and
Ecologically, unicellular organisms play central roles in nutrient cycles, decomposition, and primary production. They can adapt
From an evolutionary perspective, unicellularity is the ancestral condition for life on Earth. Several major lineages