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PUMPA - SMART LEARNING
எங்கள் ஆசிரியர்களுடன் 1-ஆன்-1 ஆலோசனை நேரத்தைப் பெறுங்கள். டாப்பர் ஆவதற்கு நாங்கள் பயிற்சி அளிப்போம்
Book Free DemoDefinition in plants:
The fusion ofa pollen grain and an embryo sac resulting the seed formation is known as sexual reproduction in flowering plants.
![787px-Sexual_cycle.svg.png](https://resources.cdn.yaclass.in/13499374-abe8-4215-a0dc-e862656a83bc/787pxSexualcyclesvgw329.png)
The cycle of sexual reproduction
The sexual reproduction of plants can be categorized into three different stages such as,
- Pre-fertilization events
- Fertilization
- Post-fertilization events
![SexualReproductionEvents1xw1754.png](https://resources.cdn.yaclass.in/409fab42-8518-4187-bcf8-e690452e68d4/SexualReproductionEvents1xw1754w827.png)
Before we start to learn about the process, we first discuss the reproductive organ of a plant.
Flower - the reproductive organ:
A flower is a modified shoot to carry out sexual reproduction. A typical flower consists of four whorls born on the thalamus.
![flower.jpg](https://resources.cdn.yaclass.in/deb6a273-bf12-4cfe-be97-d1f58a260ecb/flowerw600.jpg)
Parts of a flower
In flowers, there are four different types of whorls. All these four whorls are categorised as,
- Essential whorls - Androecium & Gynoecium
- Non-essential whorls- Calyx & Corolla
Types of flowers:
1. Flowers that contain either pistil or stamens are called unisexual flowers or incomplete flowers.
Example:
Watermelon, papaya and cucumber
2. Flowers that contain both stamens and pistil are called bisexual flowers or complete flowers.
Example:
Sunflower, lily, rose, hibiscus and mustard
Important!
Both male and female unisexual flowers may be present in the same plant or in different plants.
Reference:
https://commons.wikimedia.org/wiki/Template:Other_versions/Mature_flower_diagram#/media/File:Mature_flower_diagram.svg
https://commons.wikimedia.org/wiki/File:Sexual_cycle.svg