Which term refers to segmentation in animals?

Which term refers to segmentation in animals?

• A. Symmetry
• B. Metamerism
• C. Segmentation
• D. Polymorphism

Answer: (B)

Segmentation in animals refers to a body built from repeating units along the length. The term used to describe this repeated, modular organization is metamerism. Metamerism describes the condition of having metameres, or segments, which is seen in many groups such as earthworms and many arthropods, and even in the embryonic development of vertebrates where somites form along the body axis. Segmentation is the process of dividing the body into these segments, while metamerism is the actual segmented organization. This is why metamerism is the best term for segmentation in animals. Symmetry describes how body parts are arranged around a central axis (for example, bilateral or radial symmetry), and polymorphism refers to different forms within a species, not the segmented structure itself.

Segmentation in animals refers to a body built from repeating units along the length. The term used to describe this repeated, modular organization is metamerism. Metamerism describes the condition of having metameres, or segments, which is seen in many groups such as earthworms and many arthropods, and even in the embryonic development of vertebrates where somites form along the body axis.

Segmentation is the process of dividing the body into these segments, while metamerism is the actual segmented organization. This is why metamerism is the best term for segmentation in animals. Symmetry describes how body parts are arranged around a central axis (for example, bilateral or radial symmetry), and polymorphism refers to different forms within a species, not the segmented structure itself.