7. True or False. The arrow labeled A represents a transfer of solar energy to chemical energy. Explain why this is true or false.

Its true because the arrow letter A uses the of solar power from the sun then makes a chemical reaction to make food 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.

the answer is d p: cell, q: organ, r: organ system, s: tissue