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"How Plants Reproduce" Plant Life System PPT Courseware 3
Life is limited.
So how should life continue?
What organs do plants use to reproduce?
The pistil (ovary) and stamens (pollen) of the flower
Pollination methods: self-pollination, cross-pollination, artificial pollination
In addition to flowering and fruiting, what other methods of reproduction are there?
Asexual reproduction: cuttings, grafting, layering, division and other methods.
How are plant seeds spread?
1. Wind dispersion
2. Hydraulic dispersion
3. Dispersed by animals and humans
4. Relying on the mechanical power of the fruit itself to spread the seeds to different places
5. Seeds spread by fire
Seed plants have become the dominant group on the earth today due to their wide adaptability. They live in certain ecosystems. Due to the limitations of natural conditions, geographical isolation and transmission methods, as well as the long-term interaction between species, , making the biological composition and proportion of each ecosystem relatively stable. As the degree and scope of human activities continue to deepen and expand, humans have intentionally or unintentionally helped some species break through restrictions and isolation, expand the spread of species, and have had a negative impact on the stability and biodiversity of the original ecosystem. The huge impact should arouse our close attention.
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