protozoans

View the top three winners of this year’s Nikon Small World in Motion Competition.

The unicellular species Stentor roeseli performs a form of sequential decision-making to avoid irritating stimuli.

Some ciliates use the same trio of nucleotides to code for an amino acid and to stop translation.

Traditional stop codons have a double meaning in the protozoans' mRNA, sometimes calling for an amino acid during translation.

A plant used in traditional Mayan remedies to cure the parasitic infection produces a potent compound.

Researchers show that random rearrangement of DNA determines which of seven possible mating types the offspring of a single-celled microbe will be.

Overturning previous studies, a peculiar protozoan mysteriously uses a DNA-markup system to take out the genetic trash.   

Salinella salve, an organism described as a single layer of cells, ciliated on both inner and outer surfaces and surrounding…

A unique organism sighted only once, more than a century ago, could shed light on the evolution of multicellularity—if it ever actually existed.