Multiple Choice
Which of the following statements is NOT part of the classical cell theory?
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1. Overview of Cell Biology
History of Cell Biology
Multiple Choice
In the history of cell biology, what was Antonie van Leeuwenhoek's key contribution that helped advance ideas underlying cell theory?
A
He concluded that new cells arise only from pre-existing cells based on studies of cell division.
B
He discovered the nucleus and described it as a defining feature of eukaryotic cells.
C
He improved single-lens microscopes and was among the first to observe and describe living microorganisms (e.g., bacteria and protozoa), which he called "animalcules."
D
He proposed that all living organisms are composed of cells and that the cell is the basic unit of life.
Verified step by step guidance1
Understand the historical context of cell biology and the development of cell theory, which includes contributions from various scientists over time.
Identify Antonie van Leeuwenhoek's role, focusing on his work with microscopes and observations rather than theoretical conclusions about cells.
Recognize that van Leeuwenhoek improved the design of single-lens microscopes, which allowed him to observe living microorganisms for the first time.
Note that these microorganisms, which he called "animalcules," included bacteria and protozoa, expanding the understanding of the microscopic world.
Conclude that van Leeuwenhoek's key contribution was his pioneering observations of living microscopic life, which provided crucial evidence supporting the idea that there is a hidden world of living cells.
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