THE CELL
CELL THEORY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Cells are the basic units of organisms.
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All living things are composed of cells.
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Cells can arise only from other cells.
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All cells must eventually die.
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Detailed explanation-1: -Q. Many scientists, including Matthias Schleiden and Theodor Schwann, contributed to the cell theory. Which of the following is NOT one of the basic components of the cell theory? Cells are the basic units of organisms.
Detailed explanation-2: -The first part states that all organisms are made of cells. The second part states that cells are the basic units of life. These parts were based on a conclusion made by Schwann and Matthias Schleiden in 1838, after comparing their observations of plant and animal cells.
Detailed explanation-3: -Cell theory was given by Matthias Schleiden and Theodor Schwann in 1838. They stated that all living organisms are made up of cells. Later, Rudolf Virchow contributed to cell theory by stating that all cells originate from pre-existing cells.
Detailed explanation-4: -Credit for developing cell theory is usually given to three scientists: Theodor Schwann, Matthias Jakob Schleiden, and Rudolf Virchow. In 1839, Schwann and Schleiden suggested that cells were the basic unit of life. Their theory accepted the first two tenets of modern cell theory (see next section, below).
Detailed explanation-5: -Though cells require water for its composition and survival, it is not a part of cell theory.