Describe how polyploidy is used in the field of agriculture.

polyploidy plants are sterile, usually completely seedless, but may have vestiges of seeds (like the kind of bananas we eat do). Polyploidy plants also usually produce much larger plants than their aneuploidy counterparts do. Bigger fruits are more marketable than smaller ones.

Source from: https://answers.yahoo.com/question/index?qid=20100117182433AAx7K1t

i'm thinking (a) to keep sand in place; ////////////

explanation: a sand fence or sandbreak, like a snow fence, is used to force windblown, drifting sand to accumulate in a desired place. sand fences are employed to control erosion, sand dune stabilization, keep sand off roadways, and to recruit new material in desert areas.