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Chapter 29
Biol
| Term | Definition |
|---|---|
| sporopollenin | structure-a layer of durable polymer function- prevents exposed zygotes from dying out- found in spore walls |
| embryophtes | plants with embryos- land plants are called this because of the dependency of the embryo on the parent |
| placental transfer cells | nutrients are transferred from parent to embryo |
| gametophyte | haploid and produces haploid gametes by mitosis |
| sporophyte | fusion of gametes gives rise to diploid sporophytes that produce haploid spores by meiosis |
| sporangia | sporophytes produce spores in organs called sporangia |
| sporocytes | diploid cells called sporophytes undergo meiosis to generate haploid spores |
| gametangia | organs in which gametes are produced |
| archegonia | female gametangia that produce eggs and are the site of fertilization |
| cuticle | structure- waxy covering of the epidermis function-prevent water loss |
| mycorrhizae | symbiotic association between fungi and land plants that may have helped plants without true roots to obtain nutrients |
| vascular tissue | transport tissue- land plants can be informally grouped based on presence or absence of- allows for increased height which provides an evolutionary advantage to obtain more sunlight |
| seed | embryo and nutrients surrounded by a protective coating |
| secondary compounds | deter herbivores and parasites |
| sporophylls | Modified leaves with sporangia that produce spores |
| sori | cluster of sporangia on the undersides of sporophylls |
| homosporous | producing one type of spore that develops into a bisexual gametophyte |
| heterosporous | all seed plants and some seedless vascular plants- produce megaspores |
| megaspores | gives rise to female gametophytes |
| microspores | gives rise to male gametophytes |
| roots | organs that anchor vascular plants- enable vascular plants to absorb water and nutrients from the soil- evolved from subterranean stems |
| leaves | organs that increase the surface area of vascular plants, there by capturing more solar energy that is used for photosynthesis |
| microphylls | leaves with a single vein |
| megaphylls | leaves with a highly branched vascular system |
Created by:
gracelew
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