If you have a dense laboratory culture of bacteria in a petri what is the best measure to report its density ?

Assertion: Total number is an easily adoptable measure if the populations is huge and counting is impossible or very time consuming. Reason: In a dense laboratory culture of bacteria in a petri dish the best measures to report its density is number or biomass.

What is relative density? What is its unit?

If the measure of an arc of a circle is 60^(@) , then what is the measure of its corresponding arc ?

The rate of increases of bacteria in a certain culture is proportional to the number present. If it doubles in 5 hr.then in 25 hr.its number would be

What is anther culture ? Mention its application.

The best way to obtain bacteria and viruses free plants through tissue culture is