Question: what is the only fruit that does not have seeds

title: Seedless fruit
text: Lacking seeds , and thus the capacity to propagate via the fruit , the plants are generally propagated vegetatively from cuttings , by grafting , or in the case of bananas , from `` pups '' ( offsets ) . In such cases the resulting plants are genetically identical clones . By contrast , seedless watermelons are grown from seeds . These seeds are produced by crossing diploid and tetraploid lines of watermelon , with the resulting seeds producing sterile triploid plants . Fruit development is triggered by pollination , so these plants must be grown alongside a diploid strain to provide pollen . Triploid plants with seedless fruits can also be produced using endosperm culture for the regeneration of triploid plantlets from endosperm tissue via somatic embryogenesis .