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  4. While entering in the neck of a fern archegonium, sperm shows

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Q. While entering in the neck of a fern archegonium, sperm shows

Haryana PMTHaryana PMT 2009

Solution:

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.