How is a phylogenetic tree similar to a dichtomous key?

The response is the basis for vaccination. primary secondary tertiary none of the above

Which process of living things produces water that enters the water cycle

The frequency of alleles in a population that is in hardy weinberg equilibrium? a . changes in each successive generation b. is less important than the frequency genotypes c. shows evidence of the process of natural selection d. remains the same over several generations