What do you think is the single best criterion for telling an endosymbiont of a eukaryotic cell from an organelle?
Post Script
I must come clean and confess that I formulated this question after having read a most stimulating review by John McCutcheon and Nancy Moran that touches on this subject. Some of the responses you provided are related to considerations in this article. Read and enjoy!
—Elio
With respect to the postscript
http://download.bioon.com.cn/view/upload/201112/19191116_6450.pdf
--bks
Posted by: bks | May 15, 2013 at 06:11 PM