The original Bradford pear tree was ideal for planting because it was thought to be sterile in that it could not reproduce. -- TFA John Hammond: There you ar

The original Bradford pear tree was ideal for planting because it was thought to be sterile in that it could not reproduce. -- TFA John Hammond: There you are. There. They imprint on the first creature they come in contact with. Helps them to trust me. I've been present for the birth of every creature on this island. Ian Malcolm: Well, surely not the ones that have bred in the wild. Henry Wu: Actually, they can't breed in the wild. Population control is one of our security precautions. There is no unauthorized breeding in Jurassic Park. Ian Malcolm: Uh, and how do you know they can't breed? Henry Wu: Well that's because all the animals in Jurassic Park are female. We've engineered them that way.