how to ovules change into seeds
Answers
Explanation:
after fertilisation. ......
Answer:
Seeds develop from the ovules in the female plant, after they have been fertilised by the pollen from the male parent plant.
The ovary is a small oval underneath the stigma, which in this species is divided into three. Underneath the ovary are the five stamens.
At this stage, the seeds are too small to be visible.
As the seeds develop, the ovary gets bigger, and at this stage we can recognise it as a seedpod, or, in this case, a fruit.
Inside the developing seedpod, the seeds are still barely visible around the edge of the fruit, and most of the seedpod is empty space.
Each seed is attached to the wall of the ovary by a small stalk, through which it receives the food it needs to grow. It is therefore vital that the seeds remain attached to the ovary while they are developing.
The seeds need to form a tiny root and shoot, and to collect a store of food for the plant to use when it germinates before it has developed sufficiently to gather its own food supply.
The seedpod grows larger, but even when it has almost reached its full size, the seeds are still soft and green, most of the seedpod is still empty space, and the seedpod is still hard and green.
The seeds still need to develop a hard covering that will protect them until they are able to germinate.
The mature seedpod has reached its full size and has begun to change colour. The inside of the seedpod is full of seeds and the juicy flesh that will attract animals to eat the fruit and disperse the seeds.
The seeds are large, fully formed, have a hard protective coat and may no longer be connected to the wall of the fruit.