Biology 9700 · AS & A Level · Replication and division of nuclei and cells

Replication and division of nuclei and cells — practice question

The jellyfish $\textit{Turritopsis dohrnii}$ is said to be immortal. Provided that $T.\ dohrnii$ is not consumed by predators or affected by disease, it appears capable of living forever. There is no method for finding the biological age of an individual $T.\ dohrnii$. Which property of the cells in $T.\ dohrnii$ might account for these observations?

  • Avery long G phases in the cell cycle
  • Ba very short S phase in the cell cycle
  • Can ability to restore telomeres to their original length
  • Dfewer chromosomes than other eukaryotic organisms

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