Which best describes fertilization and meiosis in the life cycle of plants?
i. these processes are part of the life cycle.
ii. these processes produce gametophytes.
iii. fertilization produces a zygote, and meiosis produces haploid spores.
iv. fertilization is used only by seedless plants; meiosis is used only by seed plants.

The correct answer is III. Fertilization produces a zygote, and meiosis produces haploid spores.  

As a result of meiosis in the microspore mother cell four haploid microspores are formed which develops into male gametophytes, whereas, megaspores are formed as a result of meiosis in the megaspore mother cell later megaspore develops into female gametophyte.

Fertilization is the fusion of male and female gametes to form a zygote which later develops into embryo.