| Bacteria, blood cells, crystals, viruses, and plankton all do more than merely advect and diffuse as passive scalars within a fluid environment. They can display complex behaviour as they move, grow, divide or reproduce, and dissolve or die. I shall discuss the examples of nodal vesicular parcels, which are vesicles for protein transport found in the fluid flow of the node in developing vertebrate embryos; the dynamics of red blood cells; and symmetry breaking during the stirred crystallization of chiral chemical compounds. |
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