Giving 50 points for the best answer! muscle cells are specialized for contraction or movement. skin cells are specialized for protection. for example, skin cells protect the body from uv light. predict which cells would contain more mitochondria: muscle cells or skin cells explain your answer.

a and c are the answeres

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.