Pear tree pollination
When reading the page about pear trees, it says that I need two pear trees to cross pollinate, and also that the apple is a relative to pear. I have one apple tree that bears fruit (presumably someone closeby has an apple tree), but I probably can't rely on that for the pear. Will the apple tree serve as a cross-pollinator for the pear?
An apple tree is not closely enough related to a pear tree to function as a pollinator. Some pear trees are self fertile. http://homeguides.sfgate.com/pear-trees-not-need-crosspollinators-52497.html