Acertain widely distributed mammalian species remained unchanged for about 30 million years. most members of this species lived on a fertile plain, but some members (that were less well adapted) survived in low numbers in the surrounding mountains. they adapted and evolved to this area and became significantly different from their relatives on the plain. a sudden meteorite attack struck the plain and destroyed the plain population. the mountain population was unaffected and as the plain environment recovered moved to the plain. in the absence of competitors, they underwent a very rapid population explosion. which mode of evolution does this example explain

You will create a molecular clock model for an arthropod gene. follow these guidelines to make your model: . your timeline will span from 90 million years ago to the present. the common ancestor in your model is an arthropod that lived 90 million years ago. the gene that you'll track codes for a protein in the species venom . the dna sequence youll track contains 10 nitrogen bases. you can choose the order of the bases and where the mutations occur. this gene mutates at a rate of approximately 0.76 base pairs every 17.1 million years. to build your model,/ calculate the estimated time period it takes for 1 base pair to mutate. the first time period will only show the common ancestor. at the beginning of the second time period, three lineages will diverge from the common ancestor, each with a different mutation in their gene sequences. the first and third descendant species will survive for the rest of the timeline. the second descendant species was extinct 50 million years ago. calculate how long it will take for one full base pair mutation to occur. explain your reasoning by constructing a mathematical equation