Because some bacteria is bad so it can cause illnesses and diseases and some are good.
Answer:
Boston, Massachusetts, U.S. Mary Temple Grandin (born August 29, 1947) is an American scientist and activist. She is a prominent proponent for the humane treatment of livestock for slaughter and author of more than 60 scientific papers on animal behavior.
Answer:
Interspecific competition
Explanation:
This is competition between different species
Intraspecific competition is between the same species