Hey There!
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Answer:
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[tex]\huge\textbf{Cell Theory}[/tex]
the Cell Theory was give by German scientists, Schleiden and T.Shwan in 1839. It stated that,
- All organism are composed of one or more cells
- The cell is the structural and functional unit of life
- It is a de novo structure, that means it COULD arise from non living thing which was incorrect.
It was corrected by the German pathologist Rudolf Virchow in 1855. He made a convincing case, corrected and added the third point of the cell theory. It is,
- Cells can arise only by a division of pre-existing cell. It is NOT a de novo structure.
Cell theory brought a great evolution in the field of biology which established the function of organism is the result of activities and interaction of the cell units.
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[tex]\huge\textbf{Question:}[/tex]
- Flask 1: It is observed that there are no micro-organism, this is because the meat is sealed and no micro-organism could enter through it.
- Flask 2: It is observed that there are micro-organism present because meat is not sealed but open.
- Flask 3: As the S tube is used, the micro-organism are not able to reach the meat because of the curvy path
These observations support the point that cells could arise only by a division of pre-existing alive cells because in Flask 1 when there were no micro-organism present so there was no organisms found so no micro-organism arised, In flask 3 the S tube was used so no micro-organism could reach the meat thus there were no organism there which could divide to reproduce. The flask 2 was open, so the micro organisms reached the meat so they divided which means Cells can only arise by a division of pre-existing cells.
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Best Regards,
'Borz'
