To upgrade from Windows 10 Home if you have a Windows 10 product key: 1  Select the Start button, then select Settings > Update & security > Activation. 2  Select Change product key, and then enter the 25-character Windows 10 Pro product key. 3  Select Next to start the upgrade to Windows 10 Pro.
The leaves are segmented, so excess water can drain away. Rainforests have a shallow layer of fertile soil, so trees only need shallow roots to reach the nutrients. However, shallow roots can't support huge rainforest trees, so many tropical trees have developed huge buttress roots.
A buttress is an architectural structure built against or projecting from a wall which serves to support or reinforce the wall. Buttresses are fairly common on more ancient buildings, as a means of providing support to act against the lateral forces arising out of the roof structures that lack adequate bracing. The term counterfort can be synonymous with buttress, and is often used when referring to dams, retaining walls and other structures holding back earth. Early examples of buttresses are f