Pollination and Fertilisation

Mind Map by , created over 6 years ago

GCSE biology Mind Map on Pollination and Fertilisation, created by jamesjames456 on 05/23/2013.

Created by jamesjames456 over 6 years ago
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Pollination and Fertilisation
1 Flowers have male and female gametes
1.1 Male (stamen
1.1.1 Anther contains pollen grains that produce sperm
1.1.2 Filament The stalk that supports the Anther
1.2 Female (carpel)
1.2.1 Stigma End bit that pollen grains stick to
1.2.2 Style Rod-like section that supports the stigma
1.2.3 Ovary Contains the eggs
2 Pollination is the transfer of pollen from the Anther to the Stigma
2.1 Cross pollination is from one plant to another
2.2 Sexually pollinating plants rely on insects or the wind
2.2.1 Insect pollinators Have large, bright petals Scented, and have nectar glands Big, sticky pollen grains that stick to the insect Stigma is also sticky making the pollen easily attachable
2.2.2 Wind pollinators Small, dull petals Not scented, and no nectar glands A lot of pollen Small and light, easily carried by the wind Long filament - Anther hangs outside the flower More pollen can be carried by the wind Large, feathery stigma that also hangs out the flower
3 Fertilisation
3.1 The fusion of gametes
3.2 When the male gamete lands on the plant, it inserts a pollen tube and the nucleus travels to the ovary
3.2.1 Fertilisation is when the two nuclei fuse together to make a zygote This divides by mitosis to form an embryo Each fertilised female gamete forms a seed. The ovary develops into a fruit around the seed

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