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Locomotion by parapodia is observed in
1. Echino dermates
2. Some annelids
3. Some arthropods
4. Vertibrates

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Correct Answer - Option 2 : Some annelids

Concept-

  • Locomotion is the movement of organisms to propel themselves from one place to another.
  • The animal kingdom is classified into different phyla, Porifera, Coelenterata, Platyhelminthes, Nematoda, Annelida, Arthropoda, Mollusca, Echinodermata, Protochordata, and Vertebrata.

Explanation-

  • Annelida may be aquatic or terrestrial, free-living, and sometimes parasitic.
  • Almost all annelids have chitinous hair-like structures, called setae.
  • Setae located on the paddle-like appendages called parapodia.
  • Parapodia help with swimming.

Thereby locomotion by parapodia is observed in some Annelida.

  • Mode of Locomotion in Different Phylum-
    • Coelenterata- Locomotion takes place by smooth muscle fibers and tentacles.
    • Ctenophora- These have the eight external rows of ciliated comb plates, which help in locomotion.
    • Annelida- Locomotion takes place by extending the body, anchoring it to a surface with setae, and contracting body muscles.
    • Mollusca- They have a muscular foot and anchorage, which are used for locomotion.
    • Echinodermata- There is a water vascular system present that helps in locomotion.
    • Reptilia- They have a creeping or crawling mode of locomotion.

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