Evolution of symbiosis

The aphid Acyrthosiphon pisum depends on a bacterial symbiont, Buchnera aphidicola, for amino acids it can't get from plants. The aphid, in turn, provides the bacterium with energy and carbon as well as shelter inside specialized cells.

If you want to include this story in your blog, copy and paste this formatted text:

<p><a href="http://www.physorg.com/news95408496.html">Evolution of symbiosis</a></p> <p>The aphid Acyrthosiphon pisum depends on a bacterial symbiont, Buchnera aphidicola, for amino acids it can't get from plants. The aphid, in turn, provides the bacterium with energy and carbon as well as shelter inside specialized cells.</p>