suppose a fire swept through the prairie. the animals ran away, but about half the grass was burned. What would be the long-term results of this natural event?

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