Question

Q: While entering the neck of fern archegonium, sperm shows
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Answer 1

Answer:

In ferns about 32 multiflagellate, spirally coiled sperms are produced in antheridium. These sperms swim towards open archegonia due to the presence of malic acid in the latter, ie, they show chemotaxy.

Answer 2

While entering the neck of fern archegonium, sperm shows chemotaxy.

Explanation:

• In ferns, the sperm production takes place in antheridium which are spirally coiled, multiflagellate and are thirty two in number.

• The sperms then enter the female organ named archegonia which remains open and hence are said to show chemotaxy.

• The sperm produced in the antheridium of the fern gets attracted to certain chemicals which is released from the neck of the archegonium and due to these chemical substances the sperms gets attracted towards the female organ.

• This attraction of sperm due to the chemical substance releases from the female organ is called chemotaxy.

• Apart from all these, phototaxy is term given to that attraction which takes place through light and thermotaxy is the term given to that attraction which is stimulated due to temperature.

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