For almost 10,000 years we've been engineering plants by keeping the seeds from the best crops and planting those the next season. Following this practice year after year has resulted in a slow but steady change -- and a substantial cumulative effect.

We've been altering the genetic makeup of crops by cross-pollinating, too. About 8,000 years ago, for example, farmers in Central America crossed two mutant strains of a weedy-looking plant called Balsas teosinte and produced the first corn on the cob.

We've had success with the methods mentioned above (es

Some common words found in the essay are:
Central America, , Health Org, leave undisturbed, corn production, desired trait,
Approximate Word count = 453
Approximate Pages = 2 (250 words per page double spaced)