Question:

Metameric segmentation is the characteristic feature of phylum

Updated On: Jun 7, 2022
  • Annelida
  • Echinodermata
  • Mollusca
  • Platyhelminthes.
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The Correct Option is A

Solution and Explanation

Metameric segmentation or metamerism is the condition where an animal?s body (except at the head region) is divided into a number of compartments (segments or metameres) each containing the same organs. Metameric segmentation is most strongly marked in annelids in which the muscles, blood vessels and nerves etc. are repeated in each segment. Metamerism is absent in echinoderms, molluscs and platyhelminthes.
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Concepts Used:

Animal Kingdom

Animals are eukaryotic, multicellular species that belong to the Kingdom Animalia. Every animal has a distinct characteristic. They get energy either by feeding on plants or on other animals. There are millions of species that have been recognized, few shares similar characteristics while others vary drastically.

Kingdom Animalia comprises all animals. In the midst of the five kingdoms, the largest kingdom is the animal kingdom. Animals are multicellular eukaryotes. Though, like plants, they do not possess chlorophyll or a cell wall. Therefore, members of the animal kingdom indicate a heterotrophic mode of nutrition. Kingdom Animalia is further classified into ten different subphyla based on their body designs or differentiations.

The different phyla of the Kingdom Animalia are as follows:

  1. Porifera
  2. Coelenterata (Cnidaria)
  3. Platyhelminthes
  4. Nematoda
  5. Annelida
  6. Arthropoda
  7. Mollusca
  8. Echinodermata
  9. Hemichordata
  10. Chordata

Read More: Classification of Animal Kingdom