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Title: WJEC A Level DNA Process after Fertilisation
Description: Fertilisation part of WJEC exam. Detailed
Description: Fertilisation part of WJEC exam. Detailed
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Ovary>>>>Fruit
Ovule>>>>Seed
Store of food develops to provide reserves for developing embryo
Embryo consists of plumule (Developing shoot), radical (Developing root) and cotyledons (One or two seed
leaves)
Flowering plants are divided into monocotyledons and dicotyledons
...
Monocotyledons are important as they include cereals while dicotyledons are plants such as
broad beans
...
The maize is a fruit and not a seed
...
Requirements;
Suitable temperature- Optimum temperature is optimum for enzymes involved
with germination
Water- Needed for mobilised enzymes, vacuolation of cells and transport
Oxygen- respiration makes energy, in form of ATP, available for metabolism and
growth
Process after Fertilisation in a
Flowering Plant
Zygote diploid nucleus divides repeatedly by mitosis and eventually
develops into an embryo plant
...
Primary endosperm nucleus divides rapidly by mitosis forming a mass
of tissue; endosperm which nourishes the developing embryo inside
it
...
The style and stigma shrivel and the ovary becomes the fruit
The protection and dispersal of the seeds inside the fruit are aided by
changes in the ovary wall- modified ovary wall now called a pericarp
Title: WJEC A Level DNA Process after Fertilisation
Description: Fertilisation part of WJEC exam. Detailed
Description: Fertilisation part of WJEC exam. Detailed