<em>Pheidole</em> and Minor Workers (IMAGE)

McGill University

<em>Pheidole</em> and Minor Workers

Caption

The variation in the size of soldiers and minor workers is caused by the brief presence, during the larval phase of a seemingly 'useless' rudimentary organ. This discovery answers a question -- about the difference in ants in a single colony -- that it lead Charles Darwin to doubt his own theory of evolution.

Credit

Alex Wild

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