Only the bases varies from one nucleotide to another.
The number 42 can be the 42 number ones
A stopwatch would provide the most accurate measurement when sprinting
Cholera, its a water borne disease.
The region that would be eroded the most would be those at the slopes of the mountain. When heavy rainfall comes, the soil in these regions gets soften thus being forced down forming a run-off due to the force of gravity. These eroded soil would eventually continue to the valleys thus causing landslides.