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JAMB Biology 2012 Objective — Question 4

Question 4 of 50 from the Joint Admissions and Matriculation Board (JAMB) Biology 2012 Objective paper, with the correct answer and a full explanation.

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Which of the following is most advanced in the evolutionary trend of animals?

  • A. Liver fluke
  • B. Earthworm
  • C. Snail
  • D. CockroachCorrect

Explanation

The evolutionary trend among invertebrates is: Protozoa→Coelenterata→Platyhelminthess→Nematode→Annelida→Mollusca→Arthropoda→Echinodermata. Liverfluke is a platyhelminthe, earthworm is an annelid, snail is a molluscan while cockroach is an arthropod. It is crystal clear that the cockroach is the most advanced.

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