There are three domains of life: bacteria, archaea, and eukarya. Eukaryotic cells are more complex than bacteria, but there are single-celled eukaryotes, and those that don't fit into any other ...

Almost all eukaryotic organisms, from plants and animals to fungi, can't survive without mitochondria, which generate chemical energy using oxygen. However, a new study by Lukáš Novák and ...

Protists such as Blastocystis have much larger and more complex genomes than do bacteria — around 20 million base pairs for some Blastocystis subtypes, compared with fewer than 5 million for the ...

Endosymbiosis between protists and bacteria represents a fundamental biological phenomenon that has shaped the course of eukaryotic evolution. These intimate associations, in which one organism ...

Scientists scooped up the organisms, known as protists, from the surface waters of the Gulf of Maine and the Mediterranean Sea off the coast of Catalonia, Spain.They found a slew of viral DNA ...

Talk about extended family: A single-celled organism in Norway has been called "mankind's furthest relative." It is so far removed from the organisms we know that researchers claim it belongs to a ...

Their natural hosts are single-celled organisms with a cell nucleus, the protists. When giant viruses infect a host cell, they remodel the entire host cell and set up a so-called "virus factory." ...

Most were from viruses known to infect bacteria - presumably representing parasites of the protists' bacterial prey. But choanozoans and picozoans, which only occurred in the Gulf of Maine sample ...

But the exact processes that enabled life to form more complex organisms are not well understood. C. perkinsii is an ancient type of protist; protists are a collection of unicellular organisms that ...

More than 100 years ago, zoologist Herbert Spencer Jennings described surprisingly varied avoidance behaviors in the single-celled freshwater protist Stentor roeseli. When later experiments in a ...

Almost all eukaryotic organisms, from plants and animals to fungi, can't survive without mitochondria -- the 'powerhouses of the cell,' which generate chemical energy using oxygen. However, a new ...