Archebacteria are known as extremophiles. which one of the following justifies this statement? archebacteria can prepare their food using photosynthesis unlike eubacteria. archebacteria can cause extremely severe diseases in humans, unlike eubacteria. archebacteria can survive in extreme conditions, including without sunlight and oxygen, unlike the eubacteria.

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.