Answer:
Water can carry many different kinds of bacteria and possible diseases. It is important to treat the water correctly so these are not consumed. Having good water quality means having safe water to drink for all.
Explanation:
Most carbon atoms have about 4 bonding in them.
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Well to I don't know what you mean by in the following cases but, a dependent variable is the variable being tested and measured and also relies on the independent. While on the other hand the independent variable is the variable that is being changed or controlled.
Macroevolution can cause significant changes in the frequencies of alleles, that can ultimately result in speciation (forming of new species).
Various large-scale events like climate change and continental drift can greatly influence the distribution of species and adaptive radiation of different groups that can fill vacant ecological niches.
The changes in gene regulation and genetic mutations can also contribute to macroevolution by producing novel traits and adaptations.