It's important so that they know exactly where the disease started. Knowing who patient zero is helps them to identify who that person interacted with. From there, they can determine where the disease spread to. This will aid them in stopping the disease before it spreads any further.
The answer is Observation. That's the first step.
True, maria are dark, smooth, <em>flat </em>surfaces on the moon.
hope this helps:)
<span>Geographically isolated populations may live under different environmental conditions, which can lead to each of these separated populations adapting differently to these different conditions. Given enough time, these little changes can lead to those populations diverging into distinct species after so many successive generations. </span>
Decomposition - bacteria helps to decompose dead organism , it's also used in food production
