Words of Wisdom

"If there’s a defect in basic cell biology, it might be shared by other cells. So we can learn a lot about complicated organisms from studying very simple cells like yeast."

~ from an interview with biologist Susan Lindquist

Since things usually evolve from simple to complex, then it does make sense that if something's wrong with a basic function, then the problem occurred early on and continued throughout. Kind of like when you make a calculation error early on in a complicated math problem, but you don't realize it until you reach the solution, so every line thereafter is wrong (carries the error).