How does fertilization take place in the flower

simply bio 1, textbook

The germ cells form in the pollen tubes. A bee is trying to get nectar. The germ cell and egg cell fuse - the plant is fertilized. The pollen lands on the sticky stigma. A1 –W– Put the sketches in the right order. In order for new fruits and seeds to grow, a flower must be pollinated. During pollination, the pollen (pollen) is transferred to the stigma. Only then does fertilization take place. Two Types of Pollination Most flowering plants are pollinated by animals. The flowers attract bees, bumblebees, flies, ants and other animals with their bright color and scent. While the insects drink the nectar from the flower, the pollen clings to their bodies. On the next flower the insect visits, the pollen will stick to the stigma. Many plants use the wind for pollination. Their flowers are inconspicuously colored. These plants, for example some trees and shrubs, produce a large amount of pollen. It spreads with the wind and gets to other flowers. Fertilization: a seed is created A pollen grain gets on the stigma of the pistil. A pollen tube begins to grow through the stylus to the ovary of the flower. This is where the female egg is located. The male germ cells form in the pollen tubes. The first germ cell to reach the ovary fertilizes the egg cell in the ovule. The ovule is the female reproductive organ. Pollen and egg fuse together. This process is called fertilization. The seed develops from the ovule (for example the cherry pit). The fruit (for example a cherry) develops from the ovary. Propagation without fertilization There are also plants that propagate without fertilization (asexually). With these plants, new plants grow from certain parts of the plant. The celandine forms small nodules that fall off and form young plants. The strawberry forms long, thin shoots (runners), at the ends of which young plants emerge. Dead nettles form underground creeping ground shoots. With broken willow, broken branches can give way to new roots. The snowdrop forms daughter bulbs, from which new snowdrops emerge. A new plant emerges Briefly explained nectar: ​​sweet liquid that is produced by plants stigma stigma fruit knot sepal pollen grain stigma nectar pollen grains ovule egg cell with nucleus male sex cell pollen tube fertilization 128 For test purposes only - property of the publisher öbv

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