Pollination and Fertilisation - Do...

Pollination

•  Pollinationinvolvesthetransferofpollen(malegamete)fromtheanthertothestigma(outermostfemalepart)

•  Ifitisinthesamefloweritiscalled self-pollination.

•  Ifbetweendifferentflowersitiscalled cross-pollination

•  Plantsarepollinatedbyinsectsorthewind.

Pollination

Pollination

Sexualreproductioninflowers

Sexualreproductioninflowers

Fertilisation

•  Fertilisationinvolvesthefusionofthenucleusofthemalegamete(inthepollen)withthenucleusofthefemalegamete(intheovules).

Fertilisation

•  The pollen grain grows a tube. •  The tube reaches an ovule. •  The gamete nuclei fuse (fertilisation) and a

zygote (seed) forms.

Let´shavealookatsomepollentubesunderneaththemicroscope!

Fertilisation

Fertilisation

Once fertilisation has taken place the zygote (fertilised ovule)becomes a seed, and the ovary becomes a fruit. The petals die and fall off. The plant seeds are in the fruit.

Whatarefruitslike?The fruits can be:

- soft & fleshy

- hard & dry

•  Write the names of as many fruit as you can think of as a group and write them on a card

•  Stick them on the correct side of the class

• Everyone pick a fruit card and your job is to bring that piece of fruit in for next lesson!