Seeds and fruits

 

These are the picture that we have cut, to see the seeds inside the fruits

3.4 Plant Fertilisation

-the male nucleus travels down through the pollen tube into the ovule

- the pollen grains in the stigma germinates and grows downward which leads into the ovule

Diagram of a Lily

3.3b wind pollination

this is the transfer from the anther to the stigma through air carried by the wind

-light pollen grains so this allow the pollen to move through the air

-anthers (exposed)

- stigma (exposed)

these plants dont have to attract insects so they dont have particular adaptions 

so this reduce the energy needed

3.3a insect pollination

3.3 describe the structures of an insect-pollinated and a wind-pollinated flower and explain how each is adapted for pollination

transfer from the planter to the stigma of the other flower

if pollens go from one plant to another is called cross pollination 

the flower attracts the insects with their signal :

- colour petals

--> insects can see colours

- scents

--> detect the molecules

- value

--> food ( nectaries) / producing fructose

eggs in the plants are called ovules

-pollen as a source of proteins 

the stem is bending towards the light

2.81 phototropism

light --> growth --> towards light
if theres light going in every direction the stem will grow upwards
if theres lateral light the stem will grow towards the light making it bend towards the light
auxin is a hormone which causes more growth --> growth in the stem