It's beginning to look like living systems like plants, birds, and insects use quantum effects for a variety of biological functions. Strong proof is still to be discovered, but the evidence is mounting. Most heartening is that, unlike the previously cited sexual study, this one is making concrete, testable predictions that will lead to further evidence, either for or against.
And wouldn't it be spooky to ultimately define life as "systems which manipulate quantum states through carbon-based chemical processes"? I wonder what it would mean for consciousness?