Diffusion happens naturally and so does not require energy. Substances like oxygen, carbon dioxide and glucose move in and out of cells by diffusion. If I spray a little perfume over here, ...

It explains that the transition to multi-cellularity was driven by the limitations of diffusion in larger cells, necessitating the formation of smaller, organized units. Sponges, which are among ...

Diffusion tensor imaging is a magnetic resonance imaging method that measures the diffusion patterns of molecules in biological tissue. These patterns provide information on the microscopic ...