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What is the function of filiform apparatus in an angiosperm embryo sac?
- a)Brings about opening of the pollen tube
- b)Guides the pollen tube into a synergid
- c)Prevents entry of more than one pollen tube into a synergid
- d)None of these
Correct answer is option 'B'. Can you explain this answer?
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What is the function of filiform apparatus in an angiosperm embryo sa...
Filiform apparatus is an apparatus that is formed inside the embryo sac of the angiosperms by the synergid cells. This apparatus helps the pollen tube towards the egg for fertilization to happen. Thus it helps in the reproduction process of the angiospermic plants.
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What is the function of filiform apparatus in an angiosperm embryo sa...
Function of Filiform Apparatus in an Angiosperm Embryo Sac
The filiform apparatus is a structure present in the embryo sac of angiosperms. It is composed of two synergid cells that extend from the micropylar end of the embryo sac. The function of the filiform apparatus is to guide the pollen tube towards the egg cell for fertilization. Let's discuss the function of the filiform apparatus in detail:
Guides the Pollen Tube into a Synergid:
- The pollen tube grows towards the embryo sac through the micropyle.
- The filiform apparatus is composed of two synergid cells that are located near the micropyle of the embryo sac.
- The filiform apparatus secretes chemicals that attract the pollen tube towards it.
- The pollen tube is guided by the filiform apparatus towards one of the synergid cells.
- The synergid cell that is closest to the pollen tube degenerates and releases chemicals that attract the pollen tube towards the other synergid cell.
- The pollen tube enters the second synergid cell, where it releases the male gametes for fertilization.
Prevents Entry of More than One Pollen Tube into a Synergid:
- The filiform apparatus also prevents the entry of more than one pollen tube into a synergid cell.
- The filiform apparatus secretes a sticky substance that blocks the entry of additional pollen tubes.
- This ensures that only one pollen tube is able to fertilize the egg cell, preventing polyspermy.
In conclusion, the filiform apparatus plays a crucial role in the fertilization process of angiosperms. It guides the pollen tube towards the egg cell and prevents polyspermy by blocking the entry of additional pollen tubes.
The filiform apparatus is a structure present in the embryo sac of angiosperms. It is composed of two synergid cells that extend from the micropylar end of the embryo sac. The function of the filiform apparatus is to guide the pollen tube towards the egg cell for fertilization. Let's discuss the function of the filiform apparatus in detail:
Guides the Pollen Tube into a Synergid:
- The pollen tube grows towards the embryo sac through the micropyle.
- The filiform apparatus is composed of two synergid cells that are located near the micropyle of the embryo sac.
- The filiform apparatus secretes chemicals that attract the pollen tube towards it.
- The pollen tube is guided by the filiform apparatus towards one of the synergid cells.
- The synergid cell that is closest to the pollen tube degenerates and releases chemicals that attract the pollen tube towards the other synergid cell.
- The pollen tube enters the second synergid cell, where it releases the male gametes for fertilization.
Prevents Entry of More than One Pollen Tube into a Synergid:
- The filiform apparatus also prevents the entry of more than one pollen tube into a synergid cell.
- The filiform apparatus secretes a sticky substance that blocks the entry of additional pollen tubes.
- This ensures that only one pollen tube is able to fertilize the egg cell, preventing polyspermy.
In conclusion, the filiform apparatus plays a crucial role in the fertilization process of angiosperms. It guides the pollen tube towards the egg cell and prevents polyspermy by blocking the entry of additional pollen tubes.
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What is the function of filiform apparatus in an angiosperm embryo sac?a)Brings about opening of the pollen tubeb)Guides the pollen tube into a synergidc)Prevents entry of more than one pollen tube into a synergidd)None of theseCorrect answer is option 'B'. Can you explain this answer?
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