What is the evidence supporting the claim that ancient rocks contain the fossils of cells? A) The imprints of chloroplasts can be seen in the rocks. B) Radioactive tracing of CO₂ in the rocks shows similarities to modern cells. C) Microscopic examination of the rocks shows chains of cells that are similar to modern cyanobacteria. D) DNA analysis of the rocks shows similarities to modern cells. E) Pieces of RNA found in the rocks are similar to ribozymes.

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Microscopic examination of the rocks shows chains of cells that are similar to modern cyanobacteria. This is the most direct evidence that ancient rocks contain the fossils of cells. Option A is incorrect as chloroplasts are found in eukaryotic cells and would not be present in ancient prokaryotic cells. Option B is incorrect as CO₂ is not a substance found in cells. Option D is incorrect as DNA does not preserve well in ancient rocks. Option E is incorrect as ribozymes are not specific to cells and can also be found in non-living matter.

What Is the Evidence Supporting the Claim That Ancient Rocks