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(1) Amoebae and bacteria are single-celled organisms.

(2) These simple, single-celled creatures are the most primitive forms of life on earth.

(3) Occasionally the silica-rich skeletal remains of single-celled marine organisms, diatoms, and of sponges occur in pottery.

(4) Giardia lamblia is a protozoa, a single-celled animal, responsible for one of the most prevalent parasitic diseases in the world.

(5) It reproduces by releasing single-celled spores which drift off in the sea and grow into new plants.

(6) My boss is a single-celled organism.

(7) Nonetheless, there are indications that single-celled organisms can learn.

(8) Microscopic parasites include single-celled protozoans such as amoebas and sporozoa, fungi, and bacteria, which can infect animals and plants.

(9) Chlorella: This single-celled algae is packed with chlorophyll, enzymes, and anti-oxidants.

(10) Researchers had thought that only single-celled organisms such as prokaryotes and protozoa could live in the oxygen-deprived environments of the deepest ocean.

(11) The single-celled photosynthetic organisms produce much of the oxygen on earth and are the base of the marine food chain.

(12) Algae range in size from single-celled organisms to giant kelp plants. Some live near the surface of the ocean, and these algae need nitrogen to grow.

(13) Somehow, this single-celled organism had memorised the pattern of events it was faced with and changed its behaviour to anticipate a future event.

(14) These are single-celled algae which seem to absorb almost all of the extra carbon dioxide captured when the ocean is fertilised with iron.

(15) After all, he reasoned, some single-celled creatures are known to enter a hibernation-like state and survive for years with no air or food. Sentencedict.com

(16) At first glance it looks like the single-celled organism Tetrahymena thermophila has cracked this problem in spectacular fashion.

(17) An obscure single-celled flagellate with a name like a character from an Asterix book - Trimastix - also turned out to have mitochondrial genes.

(18) The dominant plants of the open ocean, then, are single-celled plants.

(19) Although none of these rocks contain fossils of shelled organisms, some of them do include fossils of single-celled microorganisms.

(20) For instance, modern-day ice cracks off Antarctica are "chockablock" with single-celled life-forms, he said.

(21) Scientists have known for some time that life exists at such depths, but they thought it mostly consisted of single-celled organisms.

(22) Composed of filaments or plates of cells, a thallus ranges in size from a single-celled structure to a complex treelike form.

(23) Globs of mud pulled from the trench have yielded an assortment of bacteria, fungi and primitive single-celled organisms called foraminifera.

(24) Diatomaceous earth (which we shall hereby call DE because it's a lot easier to type) is the fossilized remains of single-celled algae called diatoms.

(25) Scientists working for a private corporation have created the world's first synthetic life form - a single-celled organism named Synthia.

(26) Algae is a name for thousands of different organisms. They include single-celled plants as well as kelp and other large plants.

(27) These "biotic games" involve a variety of basic biological processes and some simple single-celled organisms, such as paramecia.

(28) It does not, however, have any known function in single-celled critters.

(29) In the 1970s, Todd Hennessey claimed that paramecia, the single-celled pond dweller, could be conditioned in the lab.

(30) Nearly three decades ago, Szostak began to collaborate with Blackburn, looking at the tips of the chromosome of a single-celled, pond-dwelling organism called Tetrahymena.