Foot Prothallus SEED PLANTS CLASSIFICATION: Domain: Eukarya Kingdom: Virdiplantae Vascular Seed Plants (Gymnosperms) Division: Coniferophyta Conifers Division: Cycadophyta Cycads Division: Ginkgophyta Ginkgo Division: Gnetophyta Mormon Tea Vascular Seed Plants (Angiosperms) Division: Anthophyta Flowering Plants Class: Dicotyledonae Dicots Class: Monocotyledonae Monocots INTRODUCTION TO SEED PLANTS The vascular plants possess true conducting tissue consisting of xylem and phloem. They are said to possess true leaves, roots and stems. The also possess supporting tissue for more upright growth, stomata (small pores) for the exchange of gases, and a protective layer of cutin which forms a cuticle. These characteristics allow vascular plants to get large in size. Vascular plants also begin to remove themselves from moist environments because they need less or no water for reproduction. In ferns, a single spore can germinate in the soil to form a gametophyte. Sexual reproduction follows and soon the organism is established. In Gymnosperms (naked seed) and Angiosperms (covered vessels), the spores cannot be agents of dispersal. The sporophyte is heterosporous producing two different types of spores (microspores and megaspores). The microspores, produced in microsporangia, will develop into male gametophytes (pollen). The megaspores, produced in megasporangia are located within ovules. In the Gymnosperms, the sporangia are located in cones. In the Angiosperms, the sporangia are located in flowers. Station 22 Seed Plants – What characteristics are specific to seed plants?
Foot Prothallus SEED PLANTS CLASSIFICATION: Domain: Eukarya Kingdom: Virdiplantae Vascular Seed Plants (Gymnosperms) Division: Coniferophyta Conifers Division: Cycadophyta Cycads Division: Ginkgophyta Ginkgo Division: Gnetophyta Mormon Tea Vascular Seed Plants (Angiosperms) Division: Anthophyta Flowering Plants Class: Dicotyledonae Dicots Class: Monocotyledonae Monocots INTRODUCTION TO SEED PLANTS The vascular plants possess true conducting tissue consisting of xylem and phloem. They are said to possess true leaves, roots and stems. The also possess supporting tissue for more upright growth, stomata (small pores) for the exchange of gases, and a protective layer of cutin which forms a cuticle. These characteristics allow vascular plants to get large in size. Vascular plants also begin to remove themselves from moist environments because they need less or no water for reproduction. In ferns, a single spore can germinate in the soil to form a gametophyte. Sexual reproduction follows and soon the organism is established. In Gymnosperms (naked seed) and Angiosperms (covered vessels), the spores cannot be agents of dispersal. The sporophyte is heterosporous producing two different types of spores (microspores and megaspores). The microspores, produced in microsporangia, will develop into male gametophytes (pollen). The megaspores, produced in megasporangia are located within ovules. In the Gymnosperms, the sporangia are located in cones. In the Angiosperms, the sporangia are located in flowers. Station 22 – Seed Plants What characteristics are specific to seed plants?
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