The length of $Mycobacterium$ $tuberculosis$ is: (in $\mu m$)

When a bacterium is provided with flagella arising from two opposite ends,it is called

Which of the following is an example of a prokaryotic organism?

The organisms which completely lack a cell wall and can live without oxygen are

Given below are two statements:
Statement $I$: Mycoplasma can pass through less than $1 \ \mu m$ filter size.
Statement $II$: Mycoplasma are bacteria with cell wall.
In the light of the above statements,choose the most appropriate answer from the options given below:

The habitat of $E. coli$ is