Amoeba as in a one-celled parasite with no definite form.    From Wordnik.com.  [I contemplate the symmetry of the names Obama and Biden.] Reference

A one-celled creature resembling, more than anything else.    From Wordnik.com.  [Annihilate!] Reference

"A one-celled animal-so big that it can span a whole planet?".    From Wordnik.com.  [Vagabond of Space]

Yeast is a one-celled plant which can be seen only with a microscope.    From Wordnik.com.  [Ontario Teachers' Manuals: Household Management] Reference

Eukaryotic one-celled organisms became dominant in the Proterozoic Eon.    From Wordnik.com.  [Geologic time] Reference

"The book features many enlarged photographs of the one-celled organisms.".    From Wordnik.com.  [What We're Up To, Reading-Wise] Reference

The forms most frequently seen by such an examination are one-celled plants.    From Wordnik.com.  [Physiology and Hygiene for Secondary Schools] Reference

With apologies to one-celled acquatic life everywhere, the woman is pond-scum.    From Wordnik.com.  [June 2006] Reference

Its essentially Pac-Man, but there are other one-celled organisms trying to eat you.    From Wordnik.com.  [EXTRALIFE – By Scott Johnson - Spore reviews aren’t mind blowing…] Reference

But the entire system depends on one-celled organisms and could not exist without them.    From Wordnik.com.  [An ever-deepening Egnorance - The Panda's Thumb] Reference

Compare one-celled to multi-celled organisms, to vertebrates with central nervous systems.    From Wordnik.com.  [Another definition of ID - The Panda's Thumb] Reference

During the Archean Eon life started and was dominated by one-celled prokaryotic life forms.    From Wordnik.com.  [Geologic time] Reference

We have the one-celled amoeba, the microscopic animals, and the lowest forms of animal life.    From Wordnik.com.  [The Evolution of Man Scientifically Disproved In 50 Arguments] Reference

Yeast may be introduced as another family of one-celled plants, but one which is most useful.    From Wordnik.com.  [Ontario Teachers' Manuals: Household Management] Reference

Protozoa are microscopic, one-celled organisms that can be free-living or parasitic in nature.    From Wordnik.com.  [Parasite] Reference

If all species evolved towards greater complexity, we would no longer have one-celled organisms.    From Wordnik.com.  [An ever-deepening Egnorance - The Panda's Thumb] Reference

This is a small one-celled microscopic plant having a blood red color in one stage of its existence.    From Wordnik.com.  [The Mountain that was 'God' Being a Little Book About the Great Peak Which the Indians Named 'Tacoma' but Which is Officially Called 'Rainier'] Reference

Caryopsis a one-celled, one-seeded, superior fruit in which the pericarp has fused with the seed-coat.    From Wordnik.com.  [A Handbook of Some South Indian Grasses] Reference

These one-celled creatures are also alive, are just as truly alive as are those composed of many cells.    From Wordnik.com.  [Q. E. D., or New Light on the Doctrine of Creation] Reference

In some ways politicians - and make no mistake, they're all politicians - are like one-celled organisms.    From Wordnik.com.  [Richard (RJ) Eskow: Obama, Progressives, and Leadership] Reference

The Protozoa, or one-celled animals, belonged to an unknown world before the invention of the microscope.    From Wordnik.com.  [Insects and Diseases A Popular Account of the Way in Which Insects may Spread or Cause some of our Common Diseases] Reference

The fact that an evolution from one-celled organisms to human beings has taken place is very well founded.    From Wordnik.com.  [The Idea of Design in Nature: Science or Phenomenology? By Jakob Wolf] Reference

If plants and animals all developed from a one-celled animal, such as the amoeba, why did not the amoeba develop?.    From Wordnik.com.  [The Evolution of Man Scientifically Disproved In 50 Arguments] Reference

This was a fundamental discovery, for it showed that the bacteria and one-celled animals did not fall from the sky.    From Wordnik.com.  [Leeuwenhoek Sees Animalcules] Reference

The one-celled plants called algae often divide and cling together; and the seaweeds are huge colonies of such cells.    From Wordnik.com.  [The Human Brain]

It is a one-celled animal to begin with, and then a simple metazoan resembling the fresh-water hydra or a simple jellyfish.    From Wordnik.com.  [A Case Of Conscience]

Compare the conditions surrounding a one-celled animal, living in water, to the conditions surrounding the cells in the body.    From Wordnik.com.  [Physiology and Hygiene for Secondary Schools] Reference

Even one-celled animals may have light-sensitive areas, but the true elaboration of course comes in multicellular animals, in.    From Wordnik.com.  [The Human Brain]

One possibility is that all the one-celled critters, separate species that they were, arose from one common ancestor and mutated.    From Wordnik.com.  [Communications and Science - The Panda's Thumb] Reference

In the family called Hymenomycetes there are mixed with these, and closely packed together, one-celled sterile structures named cystidia.    From Wordnik.com.  [Among the Mushrooms A Guide For Beginners] Reference

Almost like one-celled zombies, these microbes use so little energy that it might be more accurate to call them undead rather than alive.    From Wordnik.com.  [Barely Alive, Seafloor Microbes Might Resemble Exo-Organisms « Isegoria] Reference

Pretty sure it was a short story... ending with the narrator living on through de-evolving generations to primates, to one-celled critters.    From Wordnik.com.  [Neanderbabies] Reference

Their structural plans are far more varied, and they range more widely from higher and relatively complicated organisms to the unitary one-celled animals.    From Wordnik.com.  [The Doctrine of Evolution Its Basis and Its Scope] Reference

The lower one-celled organisms in nature increase by division, just as do the individual cells of a more highly organized, many-celled order of living beings.    From Wordnik.com.  [Sex Avoided subjects Discussed in Plain English] Reference

There is no doubt about that; for he had grown from a one-celled little beginning of life into a creature so big that he filled the whole of his world crammed full.    From Wordnik.com.  [Bird Stories] Reference

Thus the one-celled egg has transformed into something that it was not at first, and in doing this it has proved the possibility and the reality of organic reconstruction.    From Wordnik.com.  [The Doctrine of Evolution Its Basis and Its Scope] Reference