3.4 Plant Fertilisation

3.4 Plant Fertilisation
http://www.youtube.com/watch?v=8Ya_D-9qGmU&feature=related

• Pollen germinates / creates pollen tube 
•  Pollen tube leads to ovary
• Pollen nucleus  fertilizes egg
•  Pollen nucleus + Ovule = Zygote 
• Outside ovule - testa seed coat
• Cotylectons  - Food stores for seedling
• Fruit - wall of the ovary / carpel 

3.3b Wind Pollination

3.3b Wind Pollination

http://www.youtube.com/watch?v=3o2L8kGPV30&feature=related

• Wind transfer - transfer of pollen from anther to stigma through wind
• Light pollen grain - able to be carried by the air
• Exposed anthers and stigma in order for the wind to be able to reach it
• Stigma have large feather like surface area
• Anther makes more pollen than needed
• No color / No scent / No sugar made needed

3.3a Insect Pollination

3.3a Insect Pollination
http://www.youtube.com/watch?v=JDoBkf2y39E

• Pollen transfers from one plant's anthers to another's stigma
• Insects deliver the pollen from one plant to another
• Attractions 
• Signals
• Colored petals
• Scent
• Value
• Food - Fructose / pollen
• Male parts 
• Anther - makes pollen grain
• Stamen - made of anthers
• Filaments - stocks 
• Female parts
• Stigma - catches pollen
• Style - transfers pollen to the ovary
• Ovary carries the eggs

2.81 Phototropism

2.81 Phototropism
http://www.youtube.com/watch?v=tE4XMg4Y_d4

• Positive phototropism - Growth towards the light
• Lateral light - Light that shines on the side of the plant
• Causes the plant to bend towards it
• Hormone causes it to bend towards the light

2.80 Geotropism

2.80 Geotropism
http://www.youtube.com/watch?v=76AWJiVJR1E

• Geotropic - Geo=Gravity, Tropic=Growth Responses
• Growth responses to Gravity
• Negative Geotropism - Growth upwards
• Positive Geotropism - Growth down

2.79 Plants and stimuli

• Stimuli - Changes in Environment
  Change in light
  Change in temp
• Receptor - detect stimuli
• Response - Response to the stimuli
  Takes form of growth
• Tropism - Growth response to stimuli
  Phototroposim - Growth by light
  Geotropisim - Growth by gravity
• Plant hormone/regulator - Reactors of plants
  Ex:Auxim