Which feature must a single called protist share with a bacterial cell

In general protists and bacteria share common ancestory which means they are somehow interlinked or have similar features..They features they share include:
 
*they both first transcribe section of their DNA code into RNA then translate this RNA into protein using complex structures called ribosomes.

*they also have cell membranes made of chemicals called phospholids.
i hope i helped somehow.

Ithink a saturated phospholipid

Ibelieve the answer is relative humidity  because it makes more sense that way. solar flares usually occur in space it doesn't affect the earth, well it could but it wont make a significant damage.  latitude is land it doesnt do anything. prevailing winds, i dont know the correct meaning for this but i doubt that affects the land so it has to be relative humidity.