I believe that Bartlett Pears can self polinate. As in one tree. If you have 2 trees, well, the more the merrier, but a polinator is not needed.
Yes, honey bees can pollinate plants other than flowers. For example, in California, honey bees are absolutely essential to pollinate the almond trees.
It depends on the type of apple tree, some are self pollinating and some need other trees pollen in order to pollinate.
Victoria plums are self fertile so do not require another plum tree to pollinate them.
Not necessarily. If you have other plants in your garden (Flowers, shrubs, etc.) you will not need two apple trees. If you have no other plants in your garden, then yes, you will need two apple trees to pollinate.
Flies pollinate some plants including paw paw trees. They are food for other animals.
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Butterflies affect the environment by pollinating flowers, fruit and other types of trees, which in turn affects the environment.
Bees, birds, and many other animals can pollinate plants
Bees, birds, and many other animals can pollinate plants
Flies and all other insects that fly from flower to flower will help to pollinate.
No
Im pretty sure its the bees that help sunflowers pollinate like all other flowers