The principal biological difference between bees and wasps is that bees (except for parasitic bees) provide their young with a mixture of pollen and honey, but wasps feed their young insects or spiders. Also, whereas wasps are covered with unbranched hairs, bees have at least a few branched or feathered hairs to which pollen often clings.
Bees and wasps, however, have a great deal in common. Learn how they’re related.