Two equally frequent gametes containing only parental allele combinations and no recombinant gametes
Energy in a system is doing work such as kinetic and potential energy, that helps things move. Also more such as chemical, heat, thermal, etc.
E. Weathering - Sometimes the Earth's crust is forced to pull apart into smaller sections or pushed back together. Because of the constant movement, rocks underneath are brought up on the surface. This movement of rocks is referred to as uplift. When a metamorphic rock undergoes this process, it may be subjected to constant wear and tear. The rock will weather and may crumble into smaller pieces.