Needs of reproductive cells?

How did the research presented in the article affect scientists' understanding of the evolution of eukaryotes

The fruit of a certain plant is sweet and fleshy. the seeds of this plant have a seed coat that is fairly tough. the seeds germinate better if they are exposed to acid, or scarification. what is the most likely type of dispersal for this seed? water animal wind

About __ of the mass of the cell is water