EVERYDAY SCIENCE

Detailed explanation-1: -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-2: -It is the division of an animal’s body into linear series of similar segments (metameres) by the repetition of organs and tissues at intervals along its body. Metameric segmentation: It is an internal, mesodermal phenomenon. The basic segmental divisions are the body musculature and the coelom.

Detailed explanation-3: -Metamerism is referred to as the linear series of body segments like in tapeworms, earthworms, insects, etc. The body is elongated and divided externally by grooves into segments by rings called metamerism or annuli, and internally by septa into compartments.

Detailed explanation-4: -In some animals, the body is externally and internally divided into segments with a serial repetition of at least some organs. For example, in earthworm, the body shows this pattern and is called true or metameric segmentation and the phenomenon is known as metamerism.

Detailed explanation-5: -Metamorphism is the transformation of existing rock (the protolith) to rock with a different mineral composition or texture.