1.5
The origin of cells
Nature of science
Nature of science
Testing the general principles that underlie the natural world—the principle that cells only come from pre-existing cells needs to be verified. (1.9)
Understandings
Understandings
Cells can only be formed by division of pre-existing cells.
The first cells must have arisen from non-living material.
The origin of eukaryotic cells can be explained by the endosymbiotic theory.
Applications
Applications
Evidence from Pasteur’s experiments that spontaneous generation of cells and organisms does not now occur on Earth.
Endosymbiotic Theory Activity