Parts of an apple: fertilization

Core:

Seeds:

Surrounding of core and leftover stigma:

The part of the apple that attracts animals:

3.4 Plant Fertilization

• The pollen tubes will only complete if they are from the same species. 
• The nucleus travels down the pollen tube and into the ovule. 
• Pollen nucleus will fertilize the ovule and will leave to a formation of a zygote and will grow into the embryonic plant. 
• The outside of the ovule forms the seed coat also know as the TESTA. 
• Cotyledons are the food stores for the seedling and will support the plant until it develops its first set of leaves. 

3.3 a Insect pollination

• A pollination flower transfers pollen grain from the anther to a stigma of a plant. 
• A pollen is a small structure that contains male nuclei. 
• Transfer in an insects pollinated plant is taken place by insects. 
• Its necessary for this plant to attract insects. 
• If pollen goes from one plant to another this is called cross pollination.

3.3 b Wind pollination

• Transfer of the pollen grains are from the anther. 
• The pollen grain from the anther to the stigma is through air carried by the wind. 
• Pollen grain has lightweight pollen grains, which some wing feature. 
• It would probably let it move for efficiently through the air. 
• There is no color in the petals and no smell to attract insects.