2. Plant Reproduction adapted from www.fa.org/WebImages/FA_HTMLs/newitje/prepro.ppt

3. Structure of a Flower 1. Pistil 2. Stigma 3. Style 4. Ovary 5. Stamen 6. Filament 7. Anther 8. Petal 9. Sepal 10. Receptacle 11. Stem

4. Male Reproductive Structure  The stamen consists of two parts: Anther and Filament  The filament is a stalk that supports the anther

5. Female Reproductive Structure  The pistil consists of the stigma, style and ovary  The sticky stigma receives the pollen from the anther  The pollen grows a tube down through the style

6. Pollination  Wind, insects or other animals transfer pollen from the anther of one flower to the stigma of another  Flowers vary depending on pollination mechanism

7. Pollination Animation http://www.orst.edu/extension/mg/bot any/images/fertilization1.html

8. Fertilization {After pollen lands on stigma, a pollen tube grows down through the style to ovary

9. Seed and Fruit Development {After fertilization, the petals and sepals fall off flower {Ovary “ripens” into a fruit {The ovule develops into a seed

10. Seed Dispersal Mechanisms- Allow plants to colonize new areas and avoid shade of parent plant Wind Dispersal - Flight mechanisms, like parachutes, wings, etc. Ex. Dandelion, maples, birch Animal Dispersal - Fleshy fruits which animals eat, drop undigested seeds in feces or burrs which stick to animals’ coats

11. Gravity Dispersal - Heavy nuts fall to ground and roll ex. acorns Water Dispersal - Plants near water create floating fruits ex. coconuts