when aggregating Dictyostelium amoebae form a slug?
(The amoebae were randomly distributed, but then form an aggregate with radial symmpetry; but while it is crawling the slug has one plane of reflection symmetry.) …when a Dictyostelium slug forms a fruiting body? (Radial symmetry is restored) …when individual Dictyostelium cells become spores? (The spores have axial symmetry, plus [I think!?] an additional plane of reflection symmetry perpendicular to the axis of symmetry [like human red blood cells do, for example]) Some other species might have spores with spherical symmetry. …when embryonic regulation occurs (for example, when a Dictyostelium slug is cut into many pieces)? Notice that this amounts to a kind of dilation symmetry! Shape of stomach, heart and intestines Although most of the anatomical structure of our body has one plane of reflection symmetry, several of our internal organs do not have this reflection symmetry. They have NO symmetry. Mutation of a certain human gene causes Kartagener’s syndrome (the heart is on t
