Some groups of expert farmers grew potatoes, tobacco, tomatoes, and other plants what is the simple subject a: some group of expert farmers b: groups c: potatoes, tobacco, tomatoes, and other plants d: plants

Ascientist is designing an investigation to study the impact of invasive bird populations on local, native bird populations at backyard bird feeders. what population is most likely to be a control group for the investigation? amount of food number of bird feeders invasive bird populations local backyard birdfeeders without food