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Are observations at the scale of cells and molecules useful for making sense of properties of life we've observed/discussed at larger scales?  In what ways? 

I think properties are kind of innate and therefore start on the microscopic level then move out to where we as humans can notice them. Everything has a reason behind it or a perspective of its own. Sometimes i feel that by digging deeper (i.e. seeing things on a smaller scale) we can start to find the reasons and see the persepctives.