Aphid #1: How does growing in segments help grapefruits survive evolutionarily?
Aphid #2: Long, long, ago the Grapefruit Fathers foretold a day when things called people walk the earth, and these people would want to eat their fruit in segments.
Aphid #1: So grow in segments so you can get eaten faster -- but cultivated beforehand. That was forward thinking, my friend.
Aphid #2: Verily.