L3 Flashcards
What is pollination?
It is when pollen gets transferred from the anther to the stigma.
What different types of pollination are there?
There are two, self pollination and cross pollination.
What is self pollination?
This is when pollen gets transferred from the anther to the stigma from the same plant.
What is cross pollination?
This is when pollen grains from the anther of one plant ends up in another plant’s stigma.
What is cross pollination?
This is when pollen grains from the anther of one plant ends up in another plant’s stigma. This can happen
What are the three methods of pollination?
Wind, water or animals/pollinators.
Why do some plants not have petals or produce nectar?
They are mostly the plants that are pollinated by water or wind, meaning they don’t need to attract insects with good smells or bright colours.
What is the first step of fertilisation?
Pollination occurs (the pollen gets to the stigma)
What is the second step of fertilisation?
Germination (when the compatible pollen grains grows into the pollen tube) occurs on the stigma.
What is the third step of fertilisation?
The pollen tube grows through the stigma, down the style, and to the ovary.
What is the fourth step of fertilisation?
Pollen tube breaks through the ovary.
What is the fifth step of fertilisation?
Pollen tube breaks through the ovule.
What is the sixth step of fertilisation?
Sperm within the pollen grain fertilises the ovum.
What is the seventh and last step of fertilisation?
Fertilisation occurs.
What does the ovary have inside of them?
Ovules.
