| A | B |
|---|
| homosporous | only one spore type, so only one gametophyte type |
| heterosporous | plant makes two types of meiospores, resulting in two types of gametophytes |
| antheridia | sperm-producing organs occurring in seedless plants, fungi, and algae |
| protonema | The green filamentous growth that arises from spore germination in liverworts and mosses and eventually gives rise to a mature gametophyte |
| Kindgom Viridiplantae | The green algae and land plants |
| nonvascular plants | those plants without a vascular system (xylem and phloem |
| seedless vascular plants | They have developed a vascular structure that permits the transport of water and nutrients but they do not reproduce by seeds; |
| gametophytes | multicellular haploid organism; makes gametes via mitosis |
| sporophytes | = multicellular diploid organism; makes spores via meiosis |
| sporic meiosis | (also commonly known as intermediary meiosis), the zygote divides mitotically to produce a multicellular diploid "sporophyte". The sporophyte creates spores via meiosis which also then divide mitotically producing haploid individuals called "gametophytes". |
| gametic meiosis | instead of immediately dividing meiotically to produce haploid cells, the zygote divides mitotically to produce a multicellular diploid individual or a group of more unicellular diploid cells. |
| zygotic meiosis | a meiosis of a zygote immediately after karyogamy, which is the fusion of two cell nuclei. |
