Which of the following animal is included in protostome?
Correct answer: B. Sea mouse
- A. Sea horse
- B. Sea mouse
- C. Sea cucumber
- D. Sea lion
Explanation
Annelids, Molluscs, and arthropods fall into the category of protostomes. Sea mice belong to the phylum annelida, therefore they are protostomes.Sea lions, and sea horses are chordates, whereas sea cucumbers are echinoderms.Protostomes are organisms in which blastopore develops into the mouth. These include phylums Annelida, Arthropoda, Mollusca.Deuterostomes are organisms in which blastopore develops into anus first and later into mouth. These include phylums Echinodermata, Hemichordate, Chordata.
This question appeared on the ETEA MDCAT 2014 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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