| A | B |
|---|
| cuticle | waxy layer that prevents water loss |
| stomata | openings in the leaves that permit gas exchange for photosynthesis |
| sporophyte generation | the trend for most plants, the dominant larger part of their life cycle |
| gametophyte generation | the smaller, less dominant portion of a plant's life |
| gametangia | multicellular, protective jacket of sterile cells that surrounds the gametes |
| antheridia | structures that produce sperm cells in a plant |
| archegonia | structures that produce egg cells in a plant |
| xylem | structures that conduct water in vascular plants |
| phloem | structures that conduct dissolved sugars in vascular plants |
| alternation of generations | plants spend part of their life cycle as a multicellular haploid gametophyte & part as a multicellular diploid gametophyte |
| mosses | posses cuticle, stomata, & multicellular gametotangia; lack xylem & phloem |
| bryophtyes | Classification of non-vascular plants; examples: mosses, liverworts, hornworts |
| thalloid | gametophyte of a liverwort, (flat & lobed) |
| microphylls | small leaves thought to have evolved from lateral projections of stem tissue; characteristic of whisk ferns & club mosses |
| megaphylls | leaves that probably evolved from branch systems; characteristic of all vascular plants other than whisk ferns & club mosses |
| ferns | the largest & most diverse group of seedless vascular plants; include whisk ferns, horsetails, & club mosses |
| prothallus | fern gametophyte which develops from a haploid spore & bares both archegonia & antheridia |
| microspores | give rise to male gametophytes that produce sperm cells |
| megaspores | give rise to female gametophytes that produce egg cells |
