having a cell or cells: The ameba is a single-celled animal.
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These single-celled microbes can resemble bacteria but are quite different and play a different role in soils.
They’re not expecting anything more than microbes — bacteria-like, or other single-celled organisms.
In all other multicellular life studied to date — and in most single-celled eukaryotes, for that matter — mitochondria produce ATP in a five-step process.
Members of Gore’s laboratory at the Massachusetts Institute of Technology spend their days creating, poking and prodding isolated islands of single-celled bacteria or yeast living in each of those wells.
This word describes a single-celled microbe that moves by shape-shifting.
Evolution explains how complex and intelligent life developed from simple one-celled organisms.
In the lower orders of one-celled algæ, reproduction takes place by simple cell division.
In a one-celled individual, there is no distinction between germinal and bodily functions.
After a few days more, however, several kinds of one-celled animals may appear, some of which prey upon others.
This is a one-celled animal known as the paramœcium or the slipper animalcule (because of its shape).
When conditions unfavorable for life come, the amœba, like some one-celled plants, encysts itself within a membranous wall.