First of all, endy, there is no "chloroplasts vs. mitochondria." Plants have both.
And what's still weird? Pollination?
Welwordion-
Yes, nothing is without a cost, but movement doesn't magically turn photosynthesis from producing tons of energy to being a drain on resources. In fact, photosynthesis used to be too efficient- the reason plants use a green pigment instead of something that better absorbs yellow light is because the first photosynthesizers did use a different pigment- it was purple, which is great at absorbing yellow light. However, having soo much extra energy apparently made evolution stop working on them- they didn't need to move, they didn't need to evolve period. In the meantime, the green photosynthesizers continued evolving, since they had to to make up for their energy loss, and now all complex plants are green, while the purple bacteria are stuck in hot springs.
And, even though plants have found horribly inefficient forms of movement, that doesn't prevent them from contributing to their survival. If you gave evolution a few billion more years, plants would evolve to run, but it's just a huge evolutionary leap for them now. In fact, by their very nature, they have cell walls, which they'd have to lose first in order to move efficiently, but I don't see why they'd want to lose them in the first place- just one example of why they're stuck in their local minima.
Anyway, I don't see how genes could go from plants to animals... And even if they did, the animals wouldn't get the chloroplasts, since chloroplasts replicate on their own and basically still act like "bacteria" inside the cell, so to get chloroplast DNA you'd have to look at the chloroplast, not the nucleus.
Ikke, Peksa-
Almost forgot to say, Thanks for the sims!
I'm working on a sim where bots can only sexrepro and cannot move with conventional forms of movement (.up, .dn, .sx, .dx) and am already seeing amoeboids that move only using ties- they find a plant, grow like crazy until they kill it, then explode into a cloud of "spores", or single-celled bots, that wait until they hit a plant, and the cycle starts over again. Although the amoeboids can move a little on their own, like from one plant to another nearby one, they aren't that good at it yet- they mainly move using spores. Once I see where this goes, I'll look at yours. Thanks again!