#8 - no bee can pass. pollen gets stuck.
#7 - as long as there are no bent wires, no bee can pass. Pollen falls through
#6 - worker bees can squeeze through (and will) but they have to wiggle and squirm a lot. Drones and queens cannot.
#5 - worker bees can squeeze through easily but lose some of their pollen. Queens and drones cannot.
#4 - all bees can pass (workers, drones and queens). The workers sometimes lose some of their pollen when they catch their basket on the wire. (mice cannot and this makes a nice mouse guard)