The variety of plant really dictates its life cycle. The basic life cycle refers to how long a plant will take to grow, flower, and seed (or grow and die, depending on the variety). Plants can be annual (a plant that grows, flowers, and dies within a year), perennial (a plant that lives for years, going dormant during the winter months and coming back in the spring), or biennial (plants that live like perennials the first year, but in the second year they will grow, flower, and die).
1- MEIOSIS haploid spores are produced in the diploid sporophyte.
2- MITOSIS the haploid gametophyte produces haploid gametes.
3- FERTILIZATION haploid gametes fuse to form the diploid zygote.