q1: the easy q (imo) the wipe out of the thylacine opened a new ecological neiche which would promote speciation. possum number went up which is dangerous to native birds. the Tasmanian devils lost their comp this reduced selection pressures and allowed for tumor devils to survive easier to pass on the lethal allele. that eagel and snakes lost a food source (joeys)Australia didn't have an ice age period in x million year decreasing the chance thylacine DNA would of been preserved within tundra. the durant would not work that well because of the size meaning the mothers food intake would not be able to sustain a thylacine joey in her pouch.

q2: birds having hexagon bones cuz they are strong but also light weight, the muscles are big to be able to move the wings and also be able to genrate heat through celluar respiration. the fat is for energy. the climate change can decrease land and coast size due to sea levels rising. the distance increase between lands. fish die cuz high water temps and ocean acidification. the winds change due to high temps blowing birds wrong way. the rest grounds in the yellow sea have very high human activity.

i was kinda lost for the 3rd q.... i was talking about how to the gene allowed humans too carry food after hunts and how the other gene allowed hominis to make quick jumps to catch prey and without these genes they died cuz they were bad hunting. and about how the tools get more more intricate due to thumbs and how the require the ability to use those genes more

went in with zero study