Louis Pasteur developed the germ theory of disease, which states that many diseases are caused by microorganisms. Had scientists been skeptical but not open-minded about the idea, it would not have been published in journals.

a- all cells come from pre-existing cells

he movement of air through earth's or any planet's atmosphere is called wind, and the main cause of earth's winds is uneven heating by the sun. this uneven heating causes changes of atmospheric pressure, and winds blow from regions with high pressure to those with low pressure.

i hope this : )

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