A heterocyst constitutes a: | vedclass

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(A) Heterocysts are specialized,thick-walled cells found in certain filamentous cyanobacteria like $Nostoc$ and $Anabaena$.These cells are specialized

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Weakest link in the trichome

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(A) Heterocysts are specialized,thick-walled cells found in certain filamentous cyanobacteria like $Nostoc$ and $Anabaena$.These cells are specialized for nitrogen fixation.Because heterocysts have a different cell wall structure and are often slightly larger than vegetative cells,they create a point of mechanical weakness in the filament or trichome.Consequently,the trichome often breaks at the site of the heterocyst,making it the weakest link in the trichome.

$A$ heterocyst constitutes a:

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