Give importance of seed

Explanation

Seeds offer several advantages to angiosperms. Firstly since reproductive process such as pollination and fertilisation are independent of water, seed formation is more dependable. Also seeds have better adaptive strategies for disposal to new habitats and help the species to colonise in other areas. As they have sufficient food reserves, young seedlings are nourished until they are capable for photosynthesis on their own. The hard seed coat provides protection to the young embryo. Being products of sexual reproduction they generate new genetic combinations leading to variation.
Seed is the basis of our agriculture. Dehydration and dormancy of mature seeds are crucial for storage of seeds which can be used as food throughout the year and also to raise crop in the next season.
Viability of seed: In a few species the seeds lose viability within a few months. Seeds of a large number of species live for several years, some seeds can remain alive for hundreds of years. There are records of very old yet viable seeds. The oldest is that of a lupine. Lupinus arcticus excavated from Arctic Tundra. The seed germinated and flowered after an estimated record of 10,000 years of dormancy. A recent record of 2000 years old viable seed is of the date palm. Phoenix dactylifera was discovered during the archeological excavation at King Herod.s place near the Dead sea.
Peculiarities of some plants: Orchid fruit is one such category and each fruit contains thousands of tiny seeds. Similar is the case in fruits of some parasitic species such as orobanche adn striga.
Ficus developed from that tiny seeds