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Describe three hypotheses proposed to account for the decline in cell numbers during the death phase of a growth curve.
fermentation is carried out in an open fermenter, with nutrients added and product removed at a steady rate throughout
The red sizing bead in this image is 10um in diameter. What is the length of a chloroplast?
Link to picture for question: https://ibb.co/9p39302

biochemical characteristic of gram positive bacteria

You are provided with a culture tube of P. aeruginosa, E. coli, Salmonella typhimurium , Shigella flexneri. What biochemical test is more accurate to differentiate them?

Draw and explain chain of infection by taking example of syphilis.

In redi’s meat experiment microorganisms are not grown then why in swan

neck microorganisms are grown automatically while both are in contact with


2) Why swan neck experiment is considered as theory and challenged

spontaneous generation? 

Studies on bacteria capable of degrading antibiotics. Write down practical with apparatus and procedure.
Which type of microscope would be necessary to view the spikes (surface structure) on SARS-CoV-2 virus?
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