Overall, pretty decent. Maybe Wikipedia quality in terms of the information? That's actually better than I may have expected. It doesn't seem to be wholesale plagiarized from a website. (I don't have access to Turnitin anymore, and I haven't taken the time to find a free alternative to run it through.) That said, some sections have weird levels of detail, and the organization within each paragraph is simple and/or lacking. If you told me a computer wrote it, I would believe you, but I'd probably also believe you if you told me a random undergrad Biology student wrote it, too.