Larvae of which group are similar to chordates?
Correct answer: A. Echinodermata
- A. Echinodermata
- B. Annelida
- C. Arthropoda
- D. Nematoda
Explanation
Option[A] The larvae of echinodermata [called dipleurula larva] are characterized by bilateral symmetry. The larvae of chordates[ tornaria larva] also have bilateral symmetry so option [A] IS RIGHT.The other options are eliminated as follows:Option [B] Annelida has a free swimming trochophore larvae which is different from that of chordates.Option [C] Arthropods have larva [called instar or nymph] that is different from larvae of chordates.Option [D] Nematoda has a larval stage during their life cycle which is quite different from chordates.
This question appeared on the UHS MDCAT 2010 paper, which you can sit online with every answer explained.
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About Kingdom Animalia
Animals are multicellular, heterotrophic eukaryotes whose cells lack cell walls and chloroplasts, with specialised tissues in most groups. Coverage includes body symmetry, tissue layers, coelom, segmentation and levels of organisation, plus major phyla such as Porifera, Cnidaria, Platyhelminthes, Annelida, Arthropoda, Mollusca and Chordata.
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