Growing Plants

Page
3

dull

light

dangling

feathery

none

bright colour

sticky

inside flower

sticky

makes sugar

Slide 23

Hayfever

World of plants workbook

G – pages 34 &35

C- pages 36 & 37

Answer Q 1 – 5 on hayfever

and

Answer Q 1 – 5 on pollen

in the air from Feb - Sept

Slide 24

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).

Slide 25

Fertilisation

Slide 26

Pollen tubes

The pollen grain grows a tube.

The tube reaches an ovule.

The gamete nuclei fuse (fertilisation) and a zygote (seed) forms.

Slide 27

Pollen tube growth

Slide 28

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.

Slide 29

What are fruits like?

The fruits can be:

- soft & fleshy

- hard & dry

What fruits can you think of?

What are their seeds like?

Draw a table with headings for each type and write some examples for them.

Slide 30

Slide 31

Seeds must be carried away (dispersed / scattered) from the parent plant to:

Reduce overcrowding

Seed Dispersal- why?

Reduce competition for:

- Water

- Light

- Nutrients

Slide 32

Seed Dispersal

Slide 33

Seed Dispersal

Slide 34

Seed Dispersal

Slide 35

Activity

Cut out the seeds, match and stick them into appropriate columns in a table, for:

Wind

Animal (external)

Animal (internal)

[There is also mechanical (eg broom, sea cucumber) and water (eg coconut) but you don’t need to know them for Standard grade]