Questions & Answers

Differentiate between bilateral symmetry and radial symmetry

Answer Verified Verified
Hint:External symmetry is easy to see based on looking at an organism. There are two different types of biological symmetries found in organisms: radial symmetry and bilateral symmetry.

Complete answer:
To answer this question, first we should know about biological symmetry. Biological symmetry can be seen as a balanced distribution of copy parts or shapes in an organism's body. The biological symmetry is called the balanced distribution of the body shapes. Biological symmetry can be classified into several types: radial symmetry, bilateral symmetry, spherical symmetry, biradial symmetry and asymmetry. While sponges and placozoans consider two groups of animals that show no symmetry (i.e. asymmetric), some form of symmetry exhibits, and is defined by, the body plans of most multicellular organisms. There are now only a few kinds of symmetry in body planes that are possible.

Bilateral symmetryRadial symmetry
Bilateral symmetry produces only two sides along its sagittal plane as left and rightRadial symmetry produces halves of the same body around the central axis.
Sagittal plane splits the body into the right and left sidesCould not split the body into left and right sides
Analogous body parts are arranged equally on both the right and the left sidesAnalogous body parts are organized around the central axis in a regular fashion.

Note: The significance of symmetry is demonstrated by the fact that this feature has traditionally defined groups of animals within taxonomic groupings.