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- A form of symmetry where body parts are arranged around a central axis, allowing for multiple planes of division, common in organisms like jellyfish and sea anemones.
symmetry, in biology, the repetition of the parts in an animal or plant in an orderly fashion. Specifically, symmetry refers to a correspondence of body parts, in size, shape, and relative position, on opposite sides of a dividing line or distributed around a central point or axis.
- The Editors of Encyclopaedia Britannica
Mar 13, 2021 · The two main types of symmetry are radial symmetry (in which body parts are arranged around a central axis) and bilateral symmetry (in which organisms can be divided into two near-identical halves along a single plane).
- Kate Latham
Jun 14, 2020 · What is Radial Symmetry? The definition of radial symmetry in animals, plants and other organisms concerns a complete or partial form that is the result of a series of anatomical sections that repeat on multiple planes. By turning each section on a rotational axis, they will rotate above 0° and under 360° to near-exactly match the next section.
Aug 4, 2022 · Symmetry in biology is the balanced arrangement of body parts or shapes around a central point or axis. That is, the size, shape, and relative location on one side of a dividing line mirrors the size, shape, and relative location on the other side.
symmetry, In geometry, the property by which the sides of a figure or object reflect each other across a line (axis of symmetry) or surface; in biology, the orderly repetition of parts of an animal or plant; in chemistry, a fundamental property of orderly arrangements of atoms in molecules or crystals; in physics, a concept of balance ...
- The Editors of Encyclopaedia Britannica
Feb 3, 2023 · Symmetry is the arrangement of body parts such that they can be divided equally along an imaginary line or axis. Considering various organisms’ different shapes and orientations, scientists have developed three basic types of symmetry – radial, bilateral, or asymmetrical.
Typically, this involves repeating a body part 4, 5, 6 or 8 times around the axis – referred to as tetramerism, pentamerism, hexamerism and octamerism, respectively. Such organisms exhibit no left or right sides but do have a top and a bottom surface, or a front and a back.
