They are different because one is stronger than the other
It helps scientists improve on research and tests/examinations to understand the object a little more. For Example: The newer modified microscope helps zoom into harder to see microrganisms. So if technology changed then most of our scientific knowledge wouldve been mistaken this whole time. We wouldnt know many things if technology didnt exist.
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Your question has been heard loud and clear.
Lactobacillus is a type of bacteria that mainly occurs in fermented media like yoghurts and curds , but they are mostly present in our body and make up a part of our microbiome by being present in our digestive tracts , genital systems and urinary tracts , doing their job without harming us.
Thank you.