So, I was thinking that you could make your species automatically react in a certain way to a certain type of animal or plant on the planet they are evolving on, or utilize a certain type of animal or plant in their behavior. Relationships such as a species gathering certain colored seed pods or cones from species of plants to try and impress mates, which also spreads the seeds of the plant around, sort of making both of them evolve to rely on each other symbiosis style. I was also thinking about species developing innate fears of other species. Like how primates innately fear snakes. If it's even going to be possible to do this, how far do you guys think it will be able to go? I'd also love to hear other people's ideas about inter-species interactions.