A) plants
B) animals
C) Both [a] and [b]
D) microbes
Correct Answer: C
Solution :
[c] Schleiden and Schwann gave the cell theory, which was further refined by Rudolf Virchow (1855). The main postulates of cell theory are |
(i) All plants and animals 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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