A seed is capable of carrying out a biological program of expressing particular genes, devoting resources, and detecting directionality such that the cotyledons grow “up” because the start statholites settled “down”.
Directionality is established by the starch particles. Up and down are opposite sides of the same coin. If a plant can detect ‘down’ then the program has established (by which I mean “know”) which direction is ‘up’.
Gravitropism is just used to grow the cotyledons ‘up’ as far as I know, but like I said - one botany class, long ago; used to skip it sometimes for a midafternoon break with my girlfriend who didn't have class at that time.... pretty little thing.
Certainly no attributes of intelligence there.