3. what type of microscope (if any) would you choose to do each of the following:
a. observe e. coli bacterial cells (3 x 0.6 pm)

E. Coli Microscopy

To determine whether a strain (s) of E. coli is present in a sample, it is necessary to stain the sample. Here, Gram stain is used given that it helps distinguish between the gram positive and gram negative bacteria (such as E. coli) in a sample.

Explanation:

the menstrual cycle – higher tier. negative feedback mechanisms affect the production of hormones in the menstrual cycle. oestrogen also stimulates the release of lh (luteinising hormone) from the pituitary gland, which in turn controls the production of progesterone.