Multiple Choice
In the context of the classical cell theory (as developed by Schleiden, Schwann, and Virchow), which of the following statements is NOT part of cell theory?
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1. Overview of Cell Biology
History of Cell Biology
Multiple Choice
In the history of cell biology, what key contribution did Rudolf Virchow make to cell theory?
A
He concluded that all living organisms are composed of one or more cells and that the cell is the basic unit of life.
B
He described the structure and role of the nucleus as a fundamental component of cells.
C
He first observed cells in cork and coined the term "cell" after seeing tiny compartments.
D
He proposed that all cells arise from pre-existing cells ("Omnis cellula e cellula").
Verified step by step guidance1
Understand the context of cell theory, which is a fundamental concept in cell biology describing the properties and origins of cells.
Recall the three main historical contributions to cell theory: (1) all living organisms are made of cells, (2) the cell is the basic unit of life, and (3) all cells arise from pre-existing cells.
Identify Rudolf Virchow's key contribution, which is the proposal that new cells are formed only by the division of existing cells, summarized by the phrase "Omnis cellula e cellula."
Distinguish Virchow's contribution from those of other scientists: Robert Hooke coined the term "cell," and Matthias Schleiden and Theodor Schwann contributed to the idea that all organisms are made of cells and that the cell is the basic unit of life.
Conclude that Virchow's unique and critical addition to cell theory was emphasizing the continuity of life through cell division, rejecting spontaneous generation of cells.
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