alleryThe cell theory was modified by Rudolf Virchow's idea that:
AAll cells come from pre-existing cells (omnis cellula e cellula)
BAll cells contain DNA under typical conditions
CAll organisms are unicellular
DAll cells are similar in size
Answer & Solution
Correct answer: A. All cells come from pre-existing cells (omnis cellula e cellula)
1. Schleiden and Schwann proposed cells as the basic unit but did not explain their origin.
2. Virchow added in 1855 that new cells arise from existing cells by division.
3. The Latin phrase is omnis cellula e cellula.
4. This completed the modern cell theory.
_Source: Selina Concise Biology ICSE Class 10, Ch 1 'Cell, the Structural and Functional Unit of Life'_
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