Metamerism and Metameric Segmentation — NEET Biology
📚 Practice ConceptIn 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 called metameric segmentation and the phenomenon is known as metamerism.
Which of the following statements regarding metameric segmentation are correct? S1: Metamerism is a phenomenon where the body is externally and internally divided into segments with a serial repetition of at least some organs. S2: Annelids are characterized by metameric segmentation, where their body surface is distinctly marked out into metameres. S3: Arthropods exhibit an unsegmented body plan, primarily composed of a head, thorax, and abdomen. S4: The presence of a true coelom is a prerequisite for the manifestation of metameric segmentation in all animal phyla. S5: In Molluscs, the body is segmented, covered by a calcareous shell, and has a distinct head.
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