What Pasteur s experiment says to people

Is it the baby's vaccination?

My house just finished fighting.

.It's a shame that I didn't look at it carefully.

For these challenges, Pasteur redid Spallanzani's experiments. He poured some yeast soup into a round flask, soldered the neck of the bottle, boiled for a few minutes, and then set aside for an appropriate amount of time. The results showed that there was no microbial growth in the bottle.

This experiment does not completely refute autopotheism. They sat in Pasteur's study and made a noise: "You heated the air in the bottle while you were boiling the yeast soup.

Yeast soup produces small animals that need natural air. You can't put yeast soup with natural, unheated air without producing yeast, mold, bacilli, or critters! ”

Faced with the accusations, Pasteur pondered and decided to devise a device that would allow only natural air to enter and not the microorganisms within. Under the guidance of the old professor Barra, Pasteur finally designed and produced an instrument that met this requirement, the famous curved-neck flask. The experiment was a complete success.

He couldn't help but be overjoyed. At a great gathering in Paris, attended by scholars, talents, and artists, Pasteur recounted his curved-neck flask experiment, and loudly proclaimed: "The doctrine of spontaneous generation, after the fatal blow of this simple experiment, must never get up again."

Then, Pasteur creatively conducted a large-scale, semi-public experiment. He and his assistants split boiled flasks containing bacterial cultures into dusty urban areas, cellars at the Paris Observatory and other environments to open. It was found that the more unclean the air, the faster and more severe the deterioration of the culture medium.

This shows that the bacteria that spoil the culture medium are not self-growing, but come from the air. He speculated that the higher the altitude, the cleaner the air must have been, and the less bacterial contamination the culture would be. In order to verify this, he and his assistants climbed Mount Pope in the Jura Mountains and climbed Mont Blanc in Switzerland to conduct experiments.

As a result, the conjecture was confirmed.

Question: Can biologically altered organisms occur naturally in broth or other organic matter, hypothesis: organisms cannot occur naturally in broth or other organic matter, single variable: microorganisms in the air.

Experimental Phenomenon: He will nutrient solution.

such as broth) in a bottle with a thin curved tube that is open and allows air to enter the bottle without hindrance (leaving nothing to say to those who think that Spallanzani's experiments have made the air bad), while the microorganisms in the air are blocked and deposited at the bottom of the elbow and cannot enter the bottle. Pasteur.

The liquid in the bottle is boiled so that all the microorganisms in the liquid are killed, and then let it cool to leave without microorganisms in the bottle. At this time, if the curved neck tube is interrupted, the outside air will directly enter the nutrient solution without "precipitation treatment", and microorganisms will soon appear in the nutrient solution. It can be seen that microorganisms do not occur naturally from the nutrient solution, but from microorganisms (spores) that are already present in the air

In 1864, he reported his work at the French National Academy of Sciences. The well-known spontaneous genealists with whom he was scheduled to debate withdrew the debate. "Life comes from life", that is, biogenesis triumphed.

Conclusion: Life comes from life", that is, the triumph of biogenesis.

1. Fresh air. 2 has already been filtered out by the first cotton ball. 3. Microorganisms cannot be created in a vacuum.

4. Completely isolate the air, that is, vacuum, microorganisms will not fall on the watermelon, 5. Mold is easy to grow in a humid environment. It is easy to keep the container moist 6 There are also bacteria in the refrigerator, but the reproduction is slow at low temperatures.

1. The development of science is closely related to the progress of technology, and the new discoveries of science are based on careful thinking and meticulous experiments.

2. The story of Pasteur tells us that as long as we carefully observe, think carefully, and have the courage to practice, we can discover the mysteries of the natural world.

The Pasteur experiment supports the () argument of chiropractic.

a.The origin of life is said out of nothing.

b.The origin of life is said to carry the nucleus.

c.Embryonic debate and excavation.

d.Embryology preconception.

Correct answer: B