Bacteria of genus Nitrosomonas use __________ as their electron source.

The combination of low levels of NaCl, NaNO₃ (sodium nitrate), and slightly acid pH can prevent multiplication and toxin formation of

Organisms such as lactobacilli that have elaborate requirements for specific nutrients i.e. vitamins and other growth promoting substances, are generally called as

Quantitative measurement of bacterial growth can be carried out by measuring

What are the extrinsic factors for the microbial growth?