Honey bees have difficulties with some culitvated species of rose where the petals are large and tight because their proboscis would not be long enough to reach the nectar, but bumble bees have a longer proboscis and would be able to reach.
Honey bees do forage from the simpler rose flowers.
No
Most bees only go for brightly coloured flowers etc: roses
Roses have thorns to deter herbivores from eating them and to protect the plant from damage. Their petals are brightly colored to attract pollinators for reproduction. Additionally, roses have a strong fragrance to attract specific pollinators like bees.
Sedums do not attract bees. There are also some breeds of ivy and ice plants that do not attract bees.
No, killing bees does not attract more bees. In fact, killing bees can disrupt the balance of the bee population and harm the ecosystem.
It may be that the garden has nothing in bloom to attract bees or the bees can sense that a pesticide has been used. Sometimes people use plants that do not attract bees. Gardens that have a lot of native plants have more bees and butterflies. Plant less hybrid tea roses and more plants such as bee balm and milk weed.
Flowers attract bees by their scent and beautiful colours they have.
No, killing a bee does not attract more bees.
yes
Yes, this particular plant will indeed attract bees and butterflies.
Magnolia evolved before bees.
Yes, clematis flowers do attract bees with their nectar and pollen.