Course Content
GROWTH AND DEVELOPMENT IN PLANTS AND ANIMALS
Biology Form 3
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Seed and Fruit Development

After fertilisation, some changes occur to the ovary, the fertilized ovule and to the entire flower.

The calyx dries and falls off or persists.

The petals and the stamens wither and fall off.

 

Development of the Seed

The zygote undergoes mitotic division and develops to become embryo.

The embryo has a plumule (young shoot), a radicle (young root) and one or two cotyledons.

The primary endosperm nucleus develops into the endosperm.

The ovule forms the seed.

The ovary develops into a fruit.

The cotyledons are surrounded by a seed coat (testa)

The testa has a scar (hilum) which is the point of attachment to the placenta.

Micropyle is an opening, which allows water into the seed.

 

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