I have a situation when urbanites without any useful survival skills (bankers, marketers, curators, sociologists, etc) are mysteriously brought on a Earth like planet. They have to revert to hunting and gathering in order to survive. The plants and animals are edible.
The planet has an extreme seasonal variations, in summer temperature goes up to 58°C like Libya, while in winter it goes down to -90°C like Antarctica.
How would the descendants of this group biologically differ from us after 10,000 years?