Which scientist disproved the idea of spontaneous generation by formulating and testing the hypothesis that only flies can make flies, and that rotting mean cannot be transformed into flies.

a) charles darwin

b) lois pasteur

c) francesco redi

d) stanley miller

The correct answer is C, Francesco Redi, who in 1668 demonstrated that life originates from life and there is not the spontaneous generation of life from non-living things like meat. It was the first real experiment which disproved the theory of spontaneous generation. 

The speed of  sound:   sound travels  at different speeds depending on what it istraveling through. of the three mediums (gas, liquid, and solid)  sound waves travel the slowest through  gases, faster  through  liquids, and fastest  through  solids.