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Bacteria cannot be seen with the naked eyes, but these can be seen with the help of a microscope. If you have to carry a sample from your home to your biology laboratory to demonstrate the presence of microbes under a microscope, which sample would you carry and why?
Mention a product of human welfare obtained with the help of each one of the following microbes :
(b) Saccharomyces cerevisiae
(c) Propionibacterium shermanii
(d) Aspergillus niger
Arrange the following in the decreasing order (most important first) of their importance, for the welfare of human society. Give reasons for your answer.
Biogas, Citric acid, Penicillin and Curd