Describe one way in which global warming is considered a "postive feeback system"
June 21, 2017
List four conditions that facilitate the precipitation
June 21, 2017

Part – I
a) Briefly explain the principles of microscopy
b) What is the difference between magnification and resolution
c) Compare and contrast bright-field and dark-field microscopes
d) Explain how phase-contrast and fluorescence microscopes work.
Part – II
a) Explain the importance of staining techniques in microbiology
b) Explain the principle and describe the procedure (giving rationale for each step) of:
i. Gram stain
ii. Acid-fast stain
Part – III
Explain in details any five (physical or chemical) ways of controlling microbial growth in the food industry.


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