Of the levels of prevention associated with the natural history of disease, primary prevention refers to two levels. what are they?

of those who start drinking before they're 15 will develop alcohol dependence

many phylogenetic trees have a single lineage at the base representing a common ancestor. a lineage that evolved early from the root and remains unbranched is called basal taxon. when two lineages stem from the same branch point, they are called sister taxa.

can i get the brainliest pls

explanation: