Look carefully at the model. plants take in and release carbon dioxide. plants take in carbon dioxide for photosynthesis. what process releases carbon dioxide back into the atmosphere? a) condensation. b) precipitation. c) respiration. d) transpiration.

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