Multiple Choice
In the history of cell biology, what was Antoine van Leeuwenhoek’s most important contribution that helped shape ideas later incorporated into cell theory?
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1. Overview of Cell Biology
History of Cell Biology
Multiple Choice
In the context of the history of cell biology and the development of cell theory, what was Louis Pasteur’s key contribution?
A
He provided experimental evidence against spontaneous generation using swan-neck flask experiments, supporting the idea that cells arise from pre-existing cells.
B
He discovered the cell nucleus and described it as a common feature of plant cells.
C
He proposed that all living organisms are composed of cells as the basic unit of life.
D
He first observed and named “cells” after viewing cork tissue under a microscope.
Verified step by step guidance1
Understand the historical context of cell biology and the development of cell theory, which includes key discoveries by various scientists.
Recall that Louis Pasteur is famous for his experiments that challenged the idea of spontaneous generation, the belief that living organisms could arise from non-living matter.
Focus on Pasteur's swan-neck flask experiment, where he demonstrated that sterilized broth remained free of microbial growth unless exposed to contaminated air, thus disproving spontaneous generation.
Recognize that this experiment provided strong experimental evidence supporting the concept that cells arise only from pre-existing cells, reinforcing a fundamental principle of cell theory.
Differentiate Pasteur's contribution from other key discoveries: the identification of the cell nucleus, the proposal that all organisms are made of cells, and the first observation of cells, which were made by other scientists.
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