A tree of life depicting the hypothetical phylogeny of the three domains is shown above. A star is placed at the common ancestor of all eukaryotes. Which characteristic would a common ancestor located at the star contain? (See picture)

CHOICES: A- linear chromosomes with introns
B- circular chromosomes with introns
C- linear chromosomes lacking introns
D- circular chromosomes lacking introns

C. Linear chromosomes lacking introns

Explanation: Eukaryotes have linear chromosomes. After cellular replication, introns are spliced in eukaryotes and only keep the exons. This process also includes a 5’ cap and a poly-A tail.

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