Do Now

1. _____type of plant that has no pipes, roots, seeds, stems, leaves _____ part of the sun where nuclear fusion occurs _____ an area in space that has very strong gravity and nothing can escape _____when is a star in the main sequence _____huge hot brilliant balls of gases Do Now

2. What are gymnosperms? What are the 4 types of gymnosperms? What are the features of conifers? What are the features of gingkos? What are the features of cycads? What are the features of gnetophytes? What is the importance of gymnosperms? Key Questions

3. 1. Gymnosperm-is a plant that is vascular (pipes), has seeds but is nonflowering (does not produce flowers) • 2. The 4 types of gymnosperms are conifers, gingkos, cycads, and gnetophytes. • 3. Conifers • Seeds develop as cones • evergreen • Largest group • Keep needlelike leaves all year long • Examples=pine, spruce, fir, and hemlock

4. 4. Gingkos • One species • Seeds are fleshy structures that are attached to branches • 5. Cycads • Grow in tropics • Seeds form in cones • 6. Gnetophytes • Grow in dry areas • Seeds are in cones • Example shrub

5. Importance of gymnosperms • Conifers are • Economically important • Harvested for building, paper products, soap, paint, ink,

6. 3. Continued Features of Vascular seedless plants • B. Horsetails • small • Grow in wet marshy places • Hollow stem made of silica • C. Club Mosses • Grow in woodlands

7. 4. Importance of Vascular seedless plants • Prevents soil erosion • Form coal • Help form soil