Some flowering plants are capable of pollinating their own flowers, in a process known as self-pollination. Most plants, however, require pollen from an outside source (another plant). While true self-pollination is actually relatively rare, there are still many plants capable of achieving it.
What about pears? Are pears self-pollinating?
It actually depends on the type of pear!
Most varieties of pear are not self-pollinating, however there are a few which are. Anjou and Bartlett pears, for instance, are partially capable of self-pollination but will produce much more fruit if additional pollination is added to the flowers.