Peddling a product that consumers can duplicate for free is a tricky business. With affordable consumer technology, you can now copy a song a hundred times, with no degradation in the sound quality—and most people seem to immediately recognize why that's gonna make it harder to get paid for songs. But my first experiences with lossless, duplicable technology didn't have anything to do with my career as a rapper. My first encounter wasn't with a torrent site. Or a bootlegged disc. It was a tomato.

Seeds, quite obviously, are the mechanism of plant duplication. You drop a sunflower seed in wet dirt and, bang, you get a brand new one. Essentially, you just 'burned' a sunflower. The seeds of this new plant can then be harvested and planted to create an infinite, almost lossless supply of flowers and seeds. 'Seed saving' is the term for collecting seeds to be replanted.
So if farmers can just save seeds from previous crops, why would they still buy them from seed companies?
Monsanto is probably a familiar name to most readers. I know it's often invoked by my generation as the archetypical hulking conglomerate, which regards 'ethical concerns' only as pesky hindrances to the bottom line. But I don't have much interest in condemning agribusiness: people who know more about the industry than I do can speak to Monsanto's record more credibly than I can. Suffice it to say that Monsanto is a really big company. It sells seeds that are genetically modified to increase farmers' yields. The genes in those seeds are patented. Without Monsanto's express permission, it's illegal to save seeds for replanting. You gotta buy new ones every year.
A lot of people are concerned about Monsanto. One of those people is my mom. When I was a kid she would take me to a summer conference called the Seed Savers Exchange. Although the nature of the event wasn't completely clear to me, I knew it had something to do with her gardening. And I knew we were to stay in a tent. And I knew she would try to make me wear a bonnet. (I later learned that this penchant for homesteaders' costuming was idiosyncratic to my mother, and is not integral to any organic movement.)

At these summer events, gardeners and naturalists traded heirloom seeds, which is perfectly legal because there's no patent to infringe upon—it's just a tomato. Some of the conference participants were motivated by the concern that the planet's genetic and biological diversity was threatened by big agriculture, which tends to plant only a few varietals. So it was through Seed Savers that I had my first encounter with lossless duplication. These campers were essentially taking it upon themselves to copy and disseminate DNA. They planted heirloom varietals in isolated, uncontaminated gardens; saved their seeds; and met once a year to distribute the genetic codes around the country. You can't quite download a tomato, but in sharing seed, you can sort of upload it.
Monsanto seeds, as I mentioned, you're not allowed to save. While farmers buy the seed, they only license the the technologies inside it. And this is why Apple and Monsanto find themselves in such similar positions.
Rap fans and crop farmers are perfectly capable of duplicating the products that they purchase. To protect and maximize their earnings, Apple and Monsanto must find ways to prevent Rick Ross MP3s and Roundup Ready® sugarbeets from being copied at home in a way that would detract from future sales.