| A | B |
|---|
| angiosperms | dominate most habitats |
| gymnosperms | dominate some regions but are threatened by deforestation |
| cyanobacteria | probably the first to spread into and up freshwater streams |
| gametophyte | haploid gamete producing body |
| sporophyte | diploid product of fused gametes |
| spore | resting structure |
| green algae | gave rise to plants |
| bryophytes | nonvascular plants/fewer than 19,000 |
| liverwort, hornworts, mosses | bryophytes |
| adaptation to the land | root systems, shoot systems, vascular systems, waxy cuticle, stomata |
| vascular plants | majority of plants, have internal tissues that carry water and solutes, 2 grouos |
| vascular plants have... | seedless, seed bearing (i.e.fern, horse tails, whisk ferns) |
| microspores | develop into pollen grains, immature male gmetophyte |
| megaspores | develop on sporophyte in ovule, female gametophyte |
| pollen grains | are sperm bearing male gametophytes that develop from microspores |
