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You asked for an example of evolution of a plant? Corn is a good example. The earliest forms of corn had only three or four kernels, and were covered by a single leaf sheath, not the thick, multiple leaf sheath that covers today’s corn. It took generations of cultivation for the corn to mutate, or evolve, into the form in which we know it today. The early corn could self-seed. When the kernels ripened and matured, the retaining sheath would dry up and the kernels fell to the ground, where they could begin to grow. Modern corn is incapable of this. It has been domesticated to the point that if left without human intervention, the kernels will wither on the stalks and the thick sheath leaves will keep them there.

The pictograph infers that man arose from an ape-like creature, and the squiggly line would indicate that it was an evolution with many twists and turns.

A better representation would be the ape-like creature at the base of a fan, with numerous veins fanning out, indicating the many, many descendants of that early ape-like creature. But the veins would be of different lengths as some of the evolved species died out.

The picture: it’s a representation of the idea that modern man arose from some sort of “ape” ancestor. The squiggly lines indicate that evolution has no direction – that is, mutations/evolution weren’t trying to create homo sapiens. There were lots of side routes and dead ends (like neanderthols), some of which we don’t even know about.

Evolution on a plant:

The development of spores from ferns. They were one of the first land colonizers because they didn’t need water to reproduce.