AP BIOLOGY

Detailed explanation-1: -Metameric segmentation or metamerism is defined as the repetition of any body parts at intervals along an animal’s body. This phenomenon divides an organism’s body into or a series of similar body parts in a linear manner.

Detailed explanation-2: -segmentation, also called metamerism, or metameric segmentation, in zoology, the condition of being constructed of a linear series of repeating parts, each being a metamere (body segment, or somite) and each being formed in sequence in the embryo, from anterior to posterior.

Detailed explanation-3: -The serial repetition of organs when body is divided into compartments is called metamerism because metamerism is the phenomenon of having a linear series of body segments fundamentally similar in structure. It is mainly seen in phylum annelida. So, the correct answer is ‘Metamerism’.

Detailed explanation-4: -Metamerism is the repetition of homologous body segments.

Detailed explanation-5: –Option C: Segmentation was first observed in Annelida in the animal kingdom. Segmentation is a fundamental characteristic of Phylum Annelida. Examples include Earthworm and Leeches.