::Symmetry in biology


Symmetry::animals    Journal::radial    Title::right    Which::symmetry    Thumb::author    Finnerty::their

A selection of animals showing the range of possible symmetries, including both radial and bilateral body plans.

Symmetry in biology is the balanced distribution of duplicate body parts or shapes. In nature and biology, symmetry is approximate. For example, plant leaves, while considered symmetrical, rarely match up exactly when folded in half. Symmetry creates a class of patterns in nature, where the near-repetition of the pattern element is by reflection or rotation. The body plans of most multicellular organisms exhibit some form of symmetry, whether radial symmetry, bilateral symmetry or "spherical symmetry". A small minority, notably the sponges, exhibit no symmetry (are asymmetric).

Symmetry in biology sections
Intro  Radial symmetry  Spherical symmetry  Biradial symmetry  Asymmetry  References  Bibliography  

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