Cell theory states that all living things are made of many cells. cells can be created from molecules spontaneously. all living things are composed of cells and that all cells come from other cells. cells make up living and nonliving substances.

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