17. Which of the following best supports the claim that organisms of different domains share a common ancestor?
A Photosynthesis occurs in chloroplasts, and the citric acid cycle occurs in mitochondria,
B Glycolysis occurs in both prokaryotic cells and eukaryotic cells.
Introns are present in eukaryotic DNA but not in prokaryotic DNA.
D Errors in DNA synthesis provide some of the genetic variation in a population,
I

B Glycolysis occurs in both prokaryotic cells and eukaryotic cells.

Explanation:

The scenario that best supports the claim that organisms of different domains share a common ancestor is option B.

This is because glycolysis occurs in both prokaryotic and eukaryotic cells.

Recall that a prokaryote cell is a cell that does not have well defined nucleus and are unicellular while eukaryotes have well defined nucleus and are multicellular.

Therefore, because glycolysis occurs in both, it suggests that they share a common ancestor.

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