Maybe the big gray blob on the 100 fr note designed by Manuel Krebs is the embryo, and the small watermark-type thing on the 200 fr note is the baked potato?

As for the series not having a uniform appearance, well, the six themes and some design elements (four languages, security features) were given and had to be observed. Interesting that the coherent designs is what the chair of the jury, Jean-Christophe Ammann, actually praised in what he wrote about the Krebs suggestions: "The sense of cohesion in this homogenous series is very strong, with the themes moving from the microscopic to the astronomical (from red blood cells to the universe)" ...
The final notes will most probably look somewhat different anyway. The Swiss central bank plans to introduce them by/in 2010. And according to what Roland Tornare writes in one of the statements, "It is quite possible that more than one designer will be asked to further develop one of the banknotes. After evaluating their submissions, a decision will then be made as to which designer will be chosen to develop the entire series."
Christian