According to a scientific theory, this is done to keep the noise of the process low: https://news.ycombinator.com/item?id=23998793 https://news.ycombinator.com/

According to a scientific theory, this is done to keep the noise of the process low: https://news.ycombinator.com/item?id=23998793 https://news.ycombinator.com/item?id=23998793 Given how well conserved this is among plants, this has probably evolved multiple times and the reason why plants arrive at it must be very strong. Like say how a lot of animals living and swimming in water look like fish even though many of the ancestors of today's "fishes" lived on land: the "fish shape" evolved multiple times.