The starch hydrolysis test was observed to be negative. However, brown stated that the test for Bacillus subtilis should come out positive. When the starch plate was observed, there was a lot of growth, and there was only a small circle that was hydrolyzed in the middle of the plate. …show more content…
subtilis is a bacterium that is found in a diverse environment. It is commonly found in animals’ gastrointestinal tracts. B. subtilis can also be found on plant root surfaces, and in soil. Since animals ingest plants, they consume B. subtilis within in their food, which causes them to acquire the bacteria. However, B. subtilis has beneficial effects when its ingested which is that it helps maintain a healthy environment in the body. Microbewiki2 stated that B. subtilis are known to be mesophiles that live in temperatures ranging from 25 to 35 degree Celsius. According to Microbewiki2 the optimal temperature for B. subtilis growth is 37o C. In addition, B. subtilis live in a harsh environment, however the formation of endospores helps it survive within those