CELL STRUCTURES AND FUNCTION
CELL ORGANELLE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Cells are the basic unit of life
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All living things come from cells
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All cells came from pre-existing cells
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Cells only divide by meiosis
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Detailed explanation-1: -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.
Detailed explanation-2: -By the late 1830s, botanist Matthias Schleiden and zoologist Theodor Schwann were studying tissues and proposed the unified cell theory. The unified cell theory states that: all living things are composed of one or more cells; the cell is the basic unit of life; and new cells arise from existing cells.
Detailed explanation-3: -The 3 parts of modern cell theory are: cells pass DNA to new cells, cells of the same species are made of the same stuff, and energy flow happens inside cells. Biologists Schleiden and Schwann first proposed classic cell theory in 1839, and Virchow added to it in 1858.