Examine the four scenarios Scenario A Scenario B Scenario…
Questions
Exаmine the fоur scenаriоs Scenаriо A Scenario B Scenario C Scenario D A population of alpine wildflowers shows mostly pale-blue petals, but a few individuals in one valley recently appeared with a deep violet pigment. Over several seasons, this new pigment type remains rare but consistently shows up in each generation. A small group of ground finches is blown off course during a storm and settles on an isolated islet. A few generations later, the beak-size range on the islet looks quite different from that of the large mainland population they came from. A sudden fungal outbreak wipes out most of a regional salamander population, leaving only a handful of survivors scattered across two streams. Within a decade, the genetic variation measured in those streams is far lower than what was recorded before the die-off. In a coastal snail species, individuals with slightly thicker shells experience fewer losses to crushing predators during seasonal high tides. After many generations, the average shell thickness in the population has increased compared to earlier surveys. Scenario A represents which mechanism of evolution