What were the driving factors behind organelle evolution?

What were the driving factors behind organelle evolution?
Strength of logic doesn’t substitute for strength in numbers, and an emotional message!
Minute fossils from the depths: Deep life on Earth thrives, is fossilized, and may help us identify life elsewhere.
A plethora of exciting applications in biology has been found for Parrondo’s paradox, in which losing strategies can be combined to produce winning outcomes.
Unique selection pressures can lead to curious outcomes.
Why do some crucial scientific discoveries get left out of the canon?
Thiago França and José Monserrat discuss how episodic memories are coded by the hippocampus.
The mechanisms for how bacteria break down phosphonates in order to overcome times of phosphate limitation.
Exploring cohesin and replisome interactions during DNA replication.
Eric Bourg discusses whether calorie restriction in primates increases lifespan.