germination

pollination

• pollen lands stigma

• tube grows from polen down into ovary and into ovule

• male nucleus travels down this

• fertilisation - 2 nuclei fuse together

• forms a zygote

• undergoes cell division to form an embryo

• fertilised female gamete becomes a seed and ovary is fruit

3 conditions for germination

• water

• oxygen

• suitable temp

why does seed need water

to activate the enzymes that break down the food reserves in the seed

why do seeds need oxygen

for respiration (for growth)

why does seed need a certain temp

for enxymes in seed to work

where does seed at first get its food and where will it get food after

• gets food from its own store

• once it has grown enough green leaves it will get food from photosynthesis

what does a germinating seed contain

• hard seed coat

• embryo root

• embryo shoot

• food store

plants reproducing asexually

strawberries send out runners that take root + new plants grow from this