What is meant by the phrase alternation of generations?

Question

Please help. I'm trying to get this entire course done today. I'm so close but I can't find this answer anywhere.. Please help!

Answer 1

The angiosperm life cycle includes alternation of generations. Here a multicellular haploid (N) gametophyte generation alternates with a diploid (2N) sporophyte generation.

The sporophytes produce the haploid (N) spores by meiosis.

The sporophytes are the large plants we see dotting our landscape.

These spores will undergo mitosis and become the male and female gametophytes. Gametes are produced by the gametophytes through the process of mitosis. The gametes fuse and develop into the multicellular sporophyte.

Answer 2

alternation of generation means a diploid generation (sporophyte)  alternates with a hapliod ( gametophyte) one.