The Flower - Structure 1. Stamen – male organ of the plant Two parts of the Stamen 1. Anther – produces the pollen (male gametes) 2. Filament – stalk that holds the anther anther Filament

2. Pistil – The female organs of the plant Three Parts of the Pistil Stigma – located on the top of the pistil; sticky to collect pollen Style – tube-like structure that holds up the stigma and leads down to the ovary Ovary – contains ovules; turns into fruit Ovules – contain eggs; become seeds of the plant ;

Petal – Brightly colored parts of the stem to attract pollinators Sepal – leaves at the base of the flower; provide protection to the flower before it blossoms

Pollination - transfer of pollen from anther (male) to stigma (female) of plant; accomplished by birds, insects, and wind Two types of pollination Self-pollination - transfer of pollen to stigma on the same plant Cross-pollination - transfer of pollen to stigma in a different plant

Pollinators – organism that carries pollen from the anther of one plant to the stigma of another

Steps to make a plant embryo Pollen lands on the stigma The pollen tube travels down the style to the ovary The nuclei of the pollen unite with the nuclei of the egg The flower withers away The ovary becomes the fruit and the ovule becomes the seed

D. Seed Protected by a coat that lets the embryo survive tough conditions Fruits help to disperse seeds away from parent plants Seed germination – early growth stage of a plant embryo

Seed Germination Requires: Water Oxygen Proper Temperature Seeds remain dormant or inactive until conditions are right for germination

The seed diagram

Epicotyl – becomes the stem and leaves of the plant Hypocotyl – becomes the roots of the plant Cotyledon – food source for the growing plant