3.3b Wind Pollination

+  Anther -> Stigma using air, wind
+ Adaptations: 1. Light Pollen Grain (maybe wing feature?) 2. Anther will hang clearly sticking out on plant structure = exposed to the wind.  3. The Stigma will have a large surface area to catch the pollen as it travels in the wind.
+ Grass has no: colour, scent, nectaries, because it doesnt need to attract an insect - this would be a waste of energy.

3.3a Insect Pollination

+ The porcess of pollinating is where pollen from an Anther is transfered to another plants Stigma, this is done by insects.
+ Pollen contains male nuclei.
+ Plant -> Plant = cross polination.
+ For this process to happen the insect needs to be attracted : -Signals - coloured petals
                                                                                              -Scents
                                                                                              -Value for Insect = food, Necaries produce Fructose -> Pollen protein.
+ Parts of a plant: Male = Stamen : Anther, Filaments
                            Female= Carpel: Style (which connects) stigma, ovary - ovules

3.4 Plant Ferterlisation

+  Pollen grain on the Stigma begins to germinate, a tube begins to grow joining the grain and the ovule, the nucleus travels down this tube.
+ Pollen nucleus fertilises ovule -> Zygote/ embryotic plant
+ The outside of the ovule forms Seed coat : Testa
+ Also, inside the Ovule there are food stores inside seed called : Cotyledons
+ There is also thickening of walls of Ovary, includes sugars, proteing. forms fruit by wall of ovary/carpel.