3. What helps to bring pollen grains to the stigma?
4 Describe the tracheal system of cockroach.
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Answer:
It is carried out by cross-pollination by agents like insects,wind and sometimes even water.
Firstly in few of the plants, the stigma is quite sticky and is wide open in the case of wind pollination. ...
Thereby, the pollen grains get transferred to stigma in cross and self pollination.
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Answer:
3
- Pollination by insects
- Pollination by wind
- Pollination by water
- Artificial pollination
4
Tracheal system is a connected network of pipes in the body of cockroach whose role is to transport oxygen and carbon dioxide in and out. These pipe like structures open to the outside environment via a slit like structure known as stigmata, present on the outer surface of the cockroach body.
Explanation:
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