the seeds and runners (parts of the root)
Cryptogams and Fanerogams
as it is a reproducing organ and if it does not exist there will no flowers
The archegonium.
Flowers aid a plant in reproducing. Bees come and get pollen from a flower, and in the prosess take pollen from the male part of a flower and it is then placed on the female part. The pollen then produces a pollen tube and will soon become fruit or seeds.
reproducing
To me, the pollen grain of the male plant will pollinate to the stigma [either by self or cross pollination] to produce FRUIT.
Well, if a plant is rare, then reproducing will help keep the plant species going for years of study. Also, if a plant has been around for thousands of years(or more) then they are definitely worth reproducing for biologists and botanists to study. We can learn many things from plants like how they stay alive through the ice age or why and how they live wherever they live, and sometimes plants can even help with medicine. I know my family keeps an aloe vera plant on our counter for burns.
With vegatative propogation, taking plant parts, you will get the identical plant to the parent. Seed may vary.
A pineapple itself is not alive in the same way a plant is; it is the fruit of the pineapple plant (Ananas comosus). While the fruit can exhibit signs of life, such as ripening and responding to environmental factors, it is not capable of growing or reproducing on its own once it has been harvested. The plant from which the pineapple grows is alive, but the fruit is considered a mature, non-living part of that plant.
...reproducing sexually (and from fruiting).
A nucleolus is the center of the nucleus. It is the actual part of the nucleus that contains the hereditary information for reproducing.
The Boll Weevil destroys the cotton plant by reproducing and laying it's eggs on it, in turn makes the eggs hatch and the baby Boll Weevils eat the plant for food