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Botany – Session 11 I. Sexual Reproduction a. Steps in Fertilization i. _____________________________________________ ii. ________________________________________________________ 1. There are a number of ____________in the wall of the pollen and stigma used for recognition - if the pollen is compatible it will germinate a. These proteins are often responsible for _____________ iii. ________________________________________________________ 1. As the pollen tube grows it digest the stigma and the stile iv. ___________________________________________________ v. Once in the ovary the sperm enters the ________________ of the ovule vi. In the ovule – ______________________________ 1. Sperm + Egg = Embryo 2. Sperm + Polar Nuclei + Polar Nuclei = Endosperm (Food) vii. The endosperm provides ___________ for the developing _________ viii. The _____________ dries and hardens to make a ________________ 1 ix. ______________________________________ 1. ______________________________________ x. _____________________________________________________ 1. Fruit = _________________________ II. Classifications of Flowering Plants Monocots (more advanced) Dicots (more simple) 1. 1. 2. 2. 3. 3. 4. 4. 5. 5. 6. 6. 2 III. Seed Morphology a. Importance of the seed i. ________________________________________________ ii. Generally the seed is genetically different from the parent 1. ____________________________________________ iii. ___________________________________________________ iv. ___________________________________________________ b. A typical Dicot Seed i. Ex. Bean Seed ii. Cotyledons are a ___________________________________________ 1. In the dicot there are two cotyledons 2. Provide nutrition for young seedling iii. __________________________________________________________ __________________________________________________________ 3 c. Typical Monocot Seed i. Ex. Corn 1. ______________________________________________ 2. Has economic importance because monocots are part of animal diet and the ______________ is what provides ___________________ 3. Cotyledon does not provide nutrients to embryo a. Interesting Fact: when grains are milled the pericarp and some of the endosperm are removed to make the grain for white rice or white bread b. Brown rice and wheat bread are more nutritious because ________________________________________________ 1. Scutellum is another name for cotyledon 2. Coleoptile __________________________________________ 3. Coleorhiza___________________________________________ 4. Pericarp ____________________________________________ 4