Which two structures would provide a positive identification of a plant cell under a microscope? chloroplast, large central vacuole cytoskeleton, cell wall endoplasmic reticulum, chloroplasts large central vacuole, flagellum

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option d : from a warmer substance to a cooler substance

according to second law of thermodynamic, heat flows from higher to lower temperature region. heat is the transfer of energy from an object at higher temperature to an object at a lower temperature. so energy flows from warmer to colder objects.