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lidiya [134]
3 years ago
13

Which characteristics do cell membranes and cell walls have in common?

Biology
1 answer:
notka56 [123]3 years ago
6 0
Well both of them include DNA because cell membranes and cell walls are part  of plant cells and animal cells
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It was discovered by Alexander Fleming in the 1920's that Penicillium notatum produced a substance, know as penicillin, which ha
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Answer: (B) Fungi

Explanation:

<u>Penicillium notatum is a species of fungus</u> in the genus Penicillium. It is common in temperate and subtropical regions and can be found on salted food products, but it is mostly found in indoor environments, especially in damp or water-damaged buildings.

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Sleepwalking is most likely to be associated with ________ sleep.
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The mass of chewed food that is swallowed is called
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Which part of the cell theory do these results most support:
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<h2>Hey There!</h2><h2>_____________________________________</h2><h2>Answer:</h2><h2>_____________________________________</h2>

\huge\textbf{Cell Theory}

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
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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 <u>NOT</u> 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.

<h2>_____________________________________</h2>

\huge\textbf{Question:}

  • <u>Flask 1</u>: It is observed that there are no micro-organism, this is because the meat is sealed and no micro-organism could enter through it.
  • <u>Flask 2</u>: It is observed that there are micro-organism present because meat is not sealed but open.
  • <u>Flask 3</u>: 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<u> cells could arise only by a division of pre-existing alive cells</u> 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.

<h2><u>_____________________________________</u></h2><h2>Best Regards,</h2><h2>'Borz'</h2>

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