Students in biology class were presented with the model above and asked to revise the model to show the structures that would be present after it is used for a cellular function such as muscle contraction. Which of the following is the correct way to revise the molecule? A. Remove structure D

B. Remove structures A, B, and C

C. Remove structures C and D

D. Remove structures A, B, C, and D

Explanation:

Poop

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.

ask your friends for what they got then copy it down if you don't have any friends which is fine than google it or pay the teacher