Here's a breakdown:

* Gametophyte: This is the haploid (having one set of chromosomes) generation of a plant. It is responsible for producing gametes, which are specialized reproductive cells (sperm and egg).

* Sporophyte: This is the diploid (having two sets of chromosomes) generation of a plant. It produces spores through meiosis, which develop into gametophytes.

Simplified Plant Life Cycle:

1. Sporophyte produces spores by meiosis.

2. Spores develop into gametophytes (haploid).

3. Gametophytes produce gametes (sperm and egg).

4. Gametes fuse during fertilization to form a zygote.

5. Zygote develops into a sporophyte (diploid), completing the cycle.

Examples:

* Mosses and liverworts: The dominant generation is the gametophyte.

* Ferns and horsetails: The sporophyte generation is dominant.

* Seed plants (gymnosperms and angiosperms): The sporophyte generation is dominant, but the gametophyte generation is greatly reduced and dependent on the sporophyte.