Your molecular clock model resembles another branching chart, the phylogenetic chart, which you’ve used in this unit. Review the sample phylogenetic chart. What types of data are used to build a phylogenetic chart? How do phylogenetic charts differ from molecular models, such as the molecular clock model?

Phylogenetic models use genetic information, such as DNA analysis, much like a molecular clock model would. However, phylogenetic charts may also compare the anatomical characteristics of living organisms and fossil data to construct lineages of different species.(If that is what you are asking)

Explanation:

primary succession begins with a bare rock and ends with a forest secondary succession begins after a natural disaster where there is a temporary setback after a forest fire or local destruction, but the surrounding area can fill in

this is math not biology xd