Scientist and farmers have been using some of these techniques, such as selective breeding, for hundreds of years to improve plants and animals for human benefit.
(Scientist and farmers; have been using; some of these techniques, such as selective breeding; for hundreds of years to improve plants and animals for human benefit) (hundreds of years; to improve; plants and animals)
Scientist and farmers hundreds of years
have been using to improve
some of these techniques, such as selective breeding for hundreds of years to improve plants and animals for human benefit
plants and animals