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Science News:
Skirting the membrane dilemma: early cells may not have needed sophisticated proteins.

Long before chickens or eggs, life had to solve a difficult chicken-and-egg problem. The first cells to arise on the primordial Earth needed nutrients from their surroundings in order to grow and reproduce long enough to evolve complex proteins. Yet the membranes that encapsulate modern cells need complex proteins to act as pores that let these nutrients pass into the cells.

Presumably, primitive cells wouldn't have had these sophisticated pore proteins, so scientists have wondered how...

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