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Classifying Living Things |
| Section: NATURAL SCIENCE / THE GENOME FRONT |
| Author: |
| Publication: The world & I online |
| Issue Date: 1/1/2002 |
| Size: 188 Words, 1,256 Characters |
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It was once thought that all life-forms could be classified as either plants or animals. By the early 1970s, scientists had expanded the classification to fi...
. . .
...ctively placed under Eukarya.
Viruses are microbial entities that sit on the fence between living and nonliving matter. They have no cellular structure and must therefore infect the cells of a host to grow and replicate. Outside the host cell, they seem inanimate. Viruses that infect bacteria are known as bacteriophages; those that infect eukaryotes are called eukaryotic viruses.--D.K.D.
(157 of 1,256 characters)
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