Pollen and ovules PETALS sepal NECTARY ovule ovary style stigma anther filament STAMEN { Can you name the parts of a flower? Start at the top and work anti-clockwise.

The stamens of a flower make pollen. Pollen moves from one flower to another carried by insects, birds or the wind. This is called pollination.

Some pollen grains are very light and can be carried by the air. Others have points that catch in the hairs of insects. Inside the pollen grain are special cells that are the male sex cells of the plant.

Some pollen grains are trapped by the sugary solution on the stigma. The sugar makes the pollen grain begin to grow a long tube. The pollen tube grows down the style to an ovule.

The nucleus of the pollen cells travels down the tube and joins with the egg nucleus in the ovule. This is called fertilisation. Now the two nuclei are joined together they form a seed. The seed has a tough coat and a store of nutrients.

1. Pollen lands on stigma 2. Pollen formed on anther 3. Nucleus joins with egg cell in ovule in ovule 4. Pollen tube reaches ovule 5. Pollen tube starting to form 6. Nucleus travels down tube Can you put these events in the right order?

2. Pollen formed on anther 1. Pollen lands on stigma 5. Pollen tube starting to form 4. Pollen tube reaches ovule 6. Nucleus travels down tube The correct order is Nucleus joins with egg cell in ovule in ovule