And can reduce the effects of droughts. 1. building resistant structure building safe houses constructing dams using hurricane ties 2. building desalination plants using rain gauges using seismographs using snowplows

Constructing dams, Building desalination plants.

A drought is a natural disaster that occur in a region that receives very low precipitation. The region exhibit desert like conditions such as hot and dry climate, compact and infertile soil, and scanty available water resources. Constructing dams can preserve the available water resource, it will also help in preserving the surrounding soil in maintaining the moisture content. If the available water is saline. Then the salinity can be removed by the desalination process and the water can be used.

It could happen through mutation

Explanation:

A segment of DNA after many cell divisions could have more base pairs than it originally did as a result of mutation.

Mutation is generally defined as a sudden change to the DNA sequence of a cell. This change could be of difference forms, including:

Addition of bases to a DNA will generally lead to a longer base pairs in the DNA, deletion will lead to a shorter base pairs while substitution will only lead to a change in the base sequence without any change in the length of the DNA.