Not an expert, just got nerd sniped by the wikipedia article. But from I read about the galls, the parasite (wasp, aphid, etc) that causes it can influence the

Not an expert, just got nerd sniped by the wikipedia article. But from I read about the galls, the parasite (wasp, aphid, etc) that causes it can influence the structure/makeup of the gall through chemical/hormonal secretions. Usually the parasite wants nutrients so it "programs" the tree to grow the gall with a higher nutritional content. As an aside, these are actually excellent questions to ask your favorite LLM. I had to read the entire wikipedia article to have a basic understanding which took me 5 minutes, but I asked chatgpt "do tree galls have more nutrition or otherwise differ from the other parts of a tree?" and "how does the organism causing the gall manipulate the tree's growth process?" and got really detailed correct-sounding responses.