Angiosperm Reproduction: Flower Structure, Pollination, and Seed/Endosperm Development

Notes

Unit 1 Plant Diversity Outline: • Flower Structure and Function • Methods of Pollination • Angiosperm Life Cycle – Development of Female Gametophyte (Embryo Sacs) – Development of Male Gametophyte in Pollen Grains – Sperm Delivery by Pollen Tubes and Double Fertilization – Seed Development – Mechanisms to Prevent Self-Fertilization – Monocots and Eudicots (Dicots) – Variations in Flower Structure Angiosperms – Are commonly known as flowering plants. – Are seed plants that produce the reproductive structures called flowers and fruits. – Have Vascular Tissues – Are the most widespread and diverse of all plants. Flowers • The flower – Is an angiosperm structure specialized for sexual reproduction. Flower Structure and Function – Are composed of four floral organs: sepals, petals, stamens, and carpels Sepal Filament Anther Petal Receptacle Ovule Stigma Style Ovary Carpel Stamen – Sepals, are green protective covers for the developing flower bud. They bend outwards when the flower opens. In a few flowers, they are brightly colored like petals. – Petals are brightly colored and attract pollinators. Anther Filament Stigma Style Ovary Carpel Petal Receptacle Ovule Sepal Stamen Flower Struc...