Researching Creation

Another Interesting Perspective on Podarcis sicula

JB

Physorg pointed out another interesting perspective on the new organ within the lizards:

"Cecal valve evolution probably went hand-in-hand with a novel association between the lizards on Pod Mrcaru and microorganisms called nematodes that break down cellulose, which were found in their hindguts"

We have talked about symbiosis as a cause of biological diversity and speciation before.  Here, it could be that a symbiosis actually induced a "new" (to the population) organ to develop.

Very interesting! 

In the first of the above two links, Joe Francis talks about the immune system potentially being a part of detecting and picking up symbiotic partners.  It would be interesting to know if that is how the symbiotic association began, and if that is also what facilitated the growing of the cecal valve.