yes
No. Bees tap flowers for nectar and inadvertantly carry pollen between flowers and therefore cross pollinate the flowers.
A pollinator are insects such as the honey bee that cross pollinate flowers of the same type.
That red is not a color that the insects in question see is a reason why bees do not pollinate red gumamela flowers. The non-woody plant in question (Hibiscus rosa-sinensis) may sport orange, red or rose-white flowers. The bright colors and the long tubes tend to be perfect for hummingbirds, whose priority color is red.
Bees pollinate flowers.
Flowers don't pollinate.Bees pollinate the flower.
The bee will cross pollinate the flower, and the fertilised flower will be able to produce seeds.
So that the flowers wont self pollinate.
Plants that cross pollinate are called hybrids.
In short, they do. Greenhouses are not usually sealed, and insects can get in and out, and they will pollinate the flowers.
Hibiscus is normally clased as a shrub.
The ecological niche of a bee is the earth or sex