Plant Study Guide Prepare the definitions for the following terms http://library.thinkquest.org/3715/plant1.gif Anther the part of the stamen that produces pollen. http://diagnostics.montana.edu/Graphics/FlowerStigmaAnther.gif Corolla the bell-shaped portion of the flower. http://msuplants.com/SaylorPlants/Ref_Info/Flower_001k_color_.JPG Cotyledon the portion of the seed used as food for the young plant. http://www.kidsgardening.com/onlinecourse/Diagrams/c1/c1-1seed.gif Egg a seed before genetic information arrives from the pollen. http://www.growhydroponicgarden.com/content_images/1/grow-hydroponic-garden-51_1.jpg Filament this part of the stamen holds up the anther towards the open part of the flower. Geotropism a response to gravity. Iodine the chemical used for the starch test, turning starch black. Ovary the place in the pistil where eggs are formed Phototropism a response to light. Pistil the part of the plant that contains the ovary. Seed an egg that has received genetic information from pollen. Therefore, genetic information is transferred from one plant to another. Seed coat the protective outer covering of the seed. Sepal the protective outer petal of the flower. Stamen the part of the plant where pollen is formed. Tropism a response.