CBSE Class 9 Answered
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Asked by anjananair | 19 Apr, 2008, 01:20: PM
Expert Answer
a) All organisms are composed of similar units of organization, called cells.
b). The cells are the structural and functional unit of organisms.
Another tenet was added to this theory in 1855 by Rudolph Virchow .He stated that "All cells only arise from pre-existing cells".
Answered by | 20 Apr, 2008, 08:22: PM
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