Spontaneous generation was a (refuted) theory that some forms of life can arise from inorganic matter.
Louis Pasteur refuted it in a series of experiments, in which he boiled different matter (grape juice, broth) which would kill all the bacteria and let it stay for a long time to see if it would develop life (he also had a control condition in which he let the boiled liquid interact with the outside words, and those would develop bacterial life).
Breaks down over time and becomes dirt
Which cells in the seminiferous tubules regularly undergo mitosis?
Spermatogonia
troposphere, troposphere is where all the weather comes from
