CELL STRUCTURES AND FUNCTION
CELL STRUCTURE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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All non-living things are made of cells
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All cells come from pre-existing cells
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Cells are the basic unit of structure and function of all living things
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None of the above
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Detailed explanation-1: -The correct option is (d) All cells do not have the same chemical composition. Cell theory was given by Theodor Schwann and Matthias Jakob Schleiden.
Detailed explanation-2: -Answer and Explanation: The correct answer is a. Cell theory does not state that all cells have a nucleus.
Detailed explanation-3: -The classical cell theory was proposed by Theodor Schwann in 1839. There are three parts to this theory. The first part states that all organisms are made of cells. The second part states that cells are the basic units of life.
Detailed explanation-4: -Classical cell theory contains three explanations about cells. These principles are: cells are the basic unit of life, all living things are made up of cells, and all cells come from other cells. Cells cannot spontaneously generate, or arise from non-living matter.
Detailed explanation-5: -The three tenets of the cell theory are: All living organisms are composed of one or more cells. The cell is the basic unit of structure and organization in organisms. Cells arise from pre-existing cells.