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.
Design of buttress dams. There are 4 main kinds of buttress dams: Flat slab dam. (Multiple) arch dam. Massive head dam. Solid head dam. There are many stresses the buttress dam must withstand.Uplift on bases of buttresses is decreased when drainage is applied on the buttresses foundations.here are 4 main kinds of buttress dams: Flat slab dam. (Multiple) arch dam. Massive head dam. Solid head dam. There are many stresses the buttress dam must withstand.