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Get Answers to all your Questions
Cell theory was given by
(a) Schleiden and Schwann
(b) Virchow
(c) Hooke
(d) Haeckel
Answers (1)
Answer: (c)
In 1938, Schleiden proposed the idea that plants are made of cells.
In 1939, Schwann independently proposed the idea that plants and animals are made of cells. Also known as cell theory later.
In 1855, R. Virchow refined the cell theory by stating that cells arise from pre-existing cell.
Postulates of cell theory
1. All organisms are made of cells and cell products
2. Every organism starts as a single cell organism.
3. All cell arises from preexisting cells.
Therefore, option (c) is correct.
View full answer
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