Bacteria are benifical for humans in many ways 1) Bacteria like lactobacillus helpful in the preparation of curd 2)They are also are used in agriculture to increase soil fertility 3)They are helpful in industries to produce alcohol,wine and acetic acid 4)They are aslo used in cleaning the environment
They form under a pressure and heat that doesn't destroy the fossils. Igneous and metamorphic rock form from molten rocks thus reaching a temp that destroys the fossils within.
