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Seed Plant Notes The seed plants are called Spermatophytes I. Gymnosperms A. Characteristics • vascular • live on land • POLLEN! Gymnosperms were the first plants to make pollen. They do not need water to reproduce because pollen is transported by wind, bees, & birds. B. Gymnosperms gymno=naked sperm =seed • do not make a fruit to cover their seeds. C. Examples of Gymnosperms • Cycads look like palm trees. • Ginko Trees are native to Japan. People often plant Ginkos in the US. • Eastern Red Cedar are very common in Arkansas. • Pine Trees are a type of conifer. Conifer = gymnosperm that produces a cone. *** If it has cones and needles, it is a gymnosperm! • Conifer = cone bearing plant. • The small male cone makes pollen • The large female cone makes the seed II. Angiosperms angio = container sperm = seed • make fruit • make true flowers • If it has broad leaves, flowers, & fruit, it is an angiosperm. III. Two Types of Angiosperms MONOCOT 1. One seed leaf • you can’t split the seed in two very easily. • Example: corn 2. Narrow leaves and parallel veins DICOT 1. Two seed leaves • splits easily in two. • Example: bean 2. Broad leaves and branched veins. IV. Growth and Response 1. Tropism = a plant’s growth response to a stimulus. • Phototrophism = growth toward light. • Gravitropism = growth toward gravity • Thigmotropism = response to touch 2. Auxin = a plant hormone. = a chemical that controls growth, development, and other activities. 3. Annual = plant that has a one-year life cycle. 4. Biennial = plant with a two-year life cycle 5. Perennial = plant with a life cycle that lasts many years. 6. Deciduous = plants that are perennial but shed their leaves each fall. 7. Marcescent = bonus!!!