Which of the following is the primary meaning of the word organic in plant science? anything found in nature containing carbon

plants grown in a completely natural state

agricultural methods using fertilizer or pesticides

soil with a naturally high level of nitrogen

Asquirrel population lives in an area. over many years, a river in that area grows wider and stronger, eventually forming a canyon. the squirrel populations on the two sides of the canyon can no longer mate with each other and ultimately form distinct species. this is an example of