Question

What happens with the remaining other ovules ...if many ovules are present in a flower.....as fertilisation takes place only in one ovule ....so how it is possible to make many seeds by just one fusion with one ovule?

Answer 1

• A seed is an ripened ovule with the product of fertilization, embryo, enclosed in it.
• A fruit is a ripened ovary and encloses as many seeds as the number of (succesfully fertilized and developed) ovules in an ovary.
• Number of seeds in a fruit depends on number of ovules in a ovary. Papaya flower has many ovules in the ovary that develops into many seeds. While mango flower has single ovule in the ovary that develops into a single seed.
• Yes. all the ovules-eggs in an ovary need to be fertilized by individual pollent tube-male gamete to develop into a seed.
• If ovule is not fertilized, it aborts and no seed is formed.

A fruit is a mature ovary or clump of ovaries together with accessory structures. A tomato, a strawberry, a blackberry, a corn on the cob, a pea pod, a squash are all fruits. You notice that some of the peas inside a pod are not developed. Probably they were not fertilized. A corn cob often lacks some kernels. Probably the corn plants were not planted thickly enough to ensure full pollination. Nonetheless the fruits exist.

Ovules in the ovary become seeds when the ovary is developing into a fruit.
So since some plants like mango are uniovulate (have one ovule) , the have one seed. Some fruits like papaya, watermelon have many ovules and hence after the ovary matures into a fruit, the ovules will turn into seeds and hence the fruits will have many seeds.

CONCLUSION ; It all depends on the number of ovules in the ovary. If there is one ovule , there will be one seed. If there is more than one ovule, there will be more than one seed in the fruit.