What did fermi mean when he said, "the reaction is self-sustaining"?

What would be the most likely result if the ph of the stomach were increased to 5

Invasive species are one of the major threats to biodiversity. these species multiply quickly and compete with native species for food, sunlight, spac and other resources. on the map, determine the area where native species will have limited resources available to them due to invasion threat from invasive species threat very low low medium high very high

What is one function of the embedded proteins