1. Plant Sex
IGCSE Biology

2. Pollination
Pollination involves the transfer of pollen (male gamete) from the anther to the stigma (outermost female part)
If it is in the same flower it is called
self-pollination.
If between different flowers it is called
cross-pollination
Plants are pollinated by insects or the wind.

3. Pollination
Pollination involves the transfer of_________ (male gamete) from the __________to the _____________(outermost female part)
If it is in the____________ flower it is called
___________-pollination.
If between_____________ flowers it is called
____________-pollination
Plants are pollinated by __________or the _______.

4. Pollination
Pollination

5. Sexual reproduction in flowers

6. Fertilisation
Fertilisation involves the fusion of the nucleus of the male gamete (in the pollen) with the nucleus of the female gamete (in the ovules).
Botanical gardens booklet 2
World of plants –fruits and seeds
green

8. Fertilisation
SQA-Describe the growth of a pollen tube and fusion of gametes
SQA- Describe fertilisation and fruit formation
Botanics fruit formation
Tomato- juicy fruit
Bean- pod
Sycamore- small dry nut
Hazelnut- hard outer wall
Botanics info
Pollen tubes measured were 6, 9, 11 cm long!!

9. Let´s have a look at some pollen tubes underneath the microscope!
The pollen grain grows a tube.
The tube reaches an ovule.
The gamete nuclei fuse (fertilisation) and a zygote (seed) forms.

10. Fertilisation

11. 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.
Soft and juicy- tomato, plum and apple
Hard and dry- sycamore, dandelion

12. What are fruits like? 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!

13. To finish off…..