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Cell theory was formulated by...

Cell theory was formulated by

A

Schleiden and Schwann

B

Virchow

C

Hooke

D

Haeckel

Text Solution

Verified by Experts

The correct Answer is:
A
Schleiden (1936) and Schwann (1834) gave the cell theory, which was further refined by R. Virchow (1855). The main postulates of cell theory are
(i) All organisms are composed of cells and cell products.
(ii) All metabolic reactions take place in cells. Thus cell are structural and functional units of life.
(iii) All cell arise from pre-existing cells only. No cell can originate spontaneously but they comes into being only by division of pre-existing cells.
(iv) Every organism starts its life as a single cell.
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