A bacterial cell measures 2.5 micrometers (µm) in length. What is the size of this cell in nanometers (nm)?

250 nm

Explanation:

Data provided in the question:

Length of the bacteria cell = 2.5 micrometers (µm)

Now,

We know that,

1 m = 10⁶ µm

or

1 µm = 10⁻⁶ m

also,

1 m = 10⁹ nm

or

10⁻⁹ m = 1 nm

Therefore according to the above results we get,

2.5 micrometers (µm) = 2.5 × 10⁻⁶ m

and,

2.5 × 10⁻⁶ m = ( 2.5 × 10⁻⁶ ) × 10⁹ nm

= 2.5 × 10³

= 250 nm

the answer is a) a shiprock was formed by igneous process