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BIOLOGY

JAMB 2006 - Question 38

Biology 2006 JAMB Past Questions - Question 38: One primitive feature of the coelenterates is the possession of

Choose the most appropriate option for the gap .

One primitive feature of the coelenterates is the possession of

A: a dorsal mouth

B: radial symmetry

C: bilateral symmetry

D: a false foot

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Correct Answer

Explanation

B - Radial symmetry is one in which a cut alongthe centre or main axis of an organism in several different planes will alwaysproduce identical halves. This is a primitive feature because it-does not allowthe body parts of the organism to become specialized unlike bilateral symmetry.Organisms with bilateral symmetryhave high concentration of sense organs at the anterior region of the body andbetter developed brain.