INTRODUCTION
CELL STRUCTURE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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from nothing
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from other cells
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Either A or B
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None of the above
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Detailed explanation-1: -All living cells arise from pre-existing cells by division. The cell is the fundamental unit of structure and function in all living organisms. The activity of an organism depends on the total activity of independent cells. Energy flow (metabolism and biochemistry) occurs within cells.
Detailed explanation-2: -All cells are made from the same major classes of organic molecules: nucleic acids, proteins, carbohydrates, and lipids.
Detailed explanation-3: -In 1858, Rudolf Virchow concluded that all cells come from pre-existing cells thus completing the classical cell theory.
Detailed explanation-4: -The third part of the cell theory definition states that all cells come from preexisting cells. This means that cells don’t just appear out of thin air (known as “spontaneous generation”). New cells are always made from current cells.