Who finally refuted the theory of spontaneous generation and experimentally disproved it?

Who rejected the theory of abiogenesis?

Which of the following was absent in the free form in the primitive atmosphere at the time of the origin of life?

Which of the following combined with methane and ammonia to form water,$CO_2$ and others on early Earth?

Louis Pasteur's experiments,if you recall,proved that life can arise from only pre-existing life. Can we correct this as 'life evolves from pre-existent life',or otherwise we will never answer the question as to how the first forms of life arose? Comment.

Early Greek thinkers thought units of life called ....... were transferred to different planets including Earth.