1.5 The origin of cells
IB Syllabus Statements
Understandings:
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Cells can only be formed by division of pre-existing cells.
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The first cells must have arisen from non-living material.
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The origin of eukaryotic cells can be explained by the endosymbiotic theory.
Applications and skills:
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Application: Evidence from Pasteur’s experiments that spontaneous generation of cells and organisms does not now occur on Earth.
Videos
Origin of Cells
Flashcards
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Topic 1.5 The origin of cells SSaQ (Syllabus Statement as Questions)
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Discuss the statement "cells can only come from pre-existing cells" and the questions it raises.
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Discuss the statement "the first cells must have arisen from non-living material".
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Explain the endosymbiotic theory including the evidence that supports this idea.
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Outline Pasteur’s experiments that show that spontaneous generation of life does not now occur on Earth.
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The genetic code is basically the same for all living organisms, with a few differences. How is this significant?
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All scientific ideas need to be tested. How would you go about trying to verify the following statement: cells only come from pre-existing cells?