A plant pumps mineral ions into its root cells. Which of the following describes one of the functions of these ions? A. The ions allow water to enter the roots by osmosis. B. The ions absorb light so the plant can carry out photosynthesis. C. The ions form the apical meristem, where water is absorbed. D. The ions are stored in the ground tissue to provide support for the plant.

before, trains worked using the steam engine. thus, it uses heat so it is crucial to apply heat balance. the steam engine absorbs energy during the stage of boiling water. so, this is the endothermic reaction. when the steam is used to work the piston, it has to release this energy through running the train. the excess energy is released as an exhaust to the chimney. this is the exothermic process because it releases energy to the surroundings.

sorry to break it to ya but no one can answer your question it's just

jk but i am serious about the part that most people cant answer it beacuse you did not mention the section you are talking about. but it would if you added some detail and were a bit more specific.