Thursday, 21 April 2011



- Pollen grain on the stigma and they germinate and tubes begin to grow off them which then enter the ovule. The nucleus moves down the pollen tube to the nucleus
- Pollen nucleus will fertilize the ovule leads to formation of the Zygote (grow in the embryotic plant)
- Outside of the ovule forms the seed coat called the TESTA
- Also inside the Ovule are the Cotyledons which are food stores for the seedlings. This will support the plant until it has developed its first leafs
- Thickening of the walls of the ovaries. The plant will put in a lot of energy, things like sugars/proteins. Build up will create fruits (developed in the wall of the ovary/carpel)

Thursday, 7 April 2011



-Transfer of the pollen grain for the anther (By air, carried through Wind)  to the Stigma
- Adaptations:
1. Lightweight pollen grains with some kind of wing feature which allows them to move through the air efficiently
2. Anthers will hang well clear of any basic flower structure, exposed to the wind.
3. Stigma, large surface are, feather like structure to catch the pollen grains as they pass through the air on the wind.
- Grass, no colour in the petals and no scent to attract insects.
- Waste of energy to produce nectarines since it is a wind pollinated plant.

Wednesday, 6 April 2011



Structure: - Petals
- Staman (male part) - Anther (pollen grains), Filament
- Carpel (female part) - Stigma, style and Ovary (ovules)
- Pollinating Flower: When Pollen grain is transfers from the ANTHER in one plant to the STIGMA in another plant
- Pollen is a small stucture that contains male NUCLEI
-Flowers attracts inscent
Attraction Adaptions from Insects:
- Signals: SCENTS AND COLOUR PETALS
- Value: POLLEN (source of protein) AND FOOD (nectaries produce fructose)