In 1898 friedrich loeffler and paul frosch found evidence that the cause of a highly contagious hoof and mouth disease in livestock was a microscopic infectious particle it was discovered that this particle requires a host cell to reproduce

the sunflower because each experiment got the same results

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-payshence

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.

cells spend most of their time in interphase