Answer the following question given this paragraph: 

Plants alternate between diploid-cell plants and haploid-cell plants. This is called alternation of generations , because the plant type alternates from generation to generation. In alternation of generations, the plant alternates between a sporophyte that has diploid cells and a gametophyte that has haploid cells.


Q: When plant type alternates from generation to generation what is this called?


A:
alternation of generation