Traditional plant breeding methods involve the use of whatever genetic variation exists in a crop, so the search for new breeding possibilities involves looking for out-of-the-ordinary alleles in seed banks or far-flung locations. The technology used has generally existed for a very long time. Genetic engineering involves the use of relatively new technologies for adding genes from any (including non-plant) source to improve plants. It is more technology-intensive but opens up vast possibilities not available via conventional breeding.
Work Step by Step
This question is asking for an analytical summary of Concept 38.3 in which you summarize the traditional and modern methods of improving crops.