A Short-Term Advantage for Syngamy in the Origin of Eukaryotic Sex: Effects of Cell Fusion on Cell Cycle Duration and Other Effects Related to the Duration of the Cell Cycle—Relationship between Cell Growth Curve and the Optimal Size of the Species, and Circadian Cell Cycle in Photosynthetic Unicellular Organisms
Figure 15
Hypothetical ancestral cell cycles without G2 and growth in S phase. In this case, there would be only one checkpoint, G1/S. If this checkpoint and the duration of the S phase are constant—not dependent on environmental richness—cell size would be slightly smaller in poor environments.
