Describe three controlled experiments that help disprove the theory of spontaneous generation and led to the theory of biogenesis?

Francesco Redi and Louis Pasteur disproved spontaneous generation.

Redi experimented with raw meat in two flasks: one with and one without a top. He left the meat sitting in each flask for a few days and the one without the top had maggots and the one with the top had no maggots. Many people disregarded his experiment and kept thinking living things came from nonliving things.

Pasteur experimented a few years later with two swan necked flasks and broth from a soup. One flask was tilted and the other wasn't. In the tilted flask the broth was fogged with microorganisms and the other flask was the same as before. Not only did he disprove spontaneous generation, but he was believed and came up with the theory of biogenesis which means all living organisms came from other living organisms.

Hope I helped :D