http://news.bbc.co.uk/hi/english/sci/tech/newsid_1630000/1630158.stm

Very very interesting.

"It is possible that more than two billion years ago, a distant relative of these microbes, which had the ability to convert sunlight into food and make cellulose, was absorbed by another organism to trigger the emergence of new lifeforms that eventually led to modern day plants. "

Very interesting. We knew we have something in common with our plant life...