Question #eba16

1 Answer
Sep 20, 2017

No. Separation discs and heterocysts are both different ways in which hormogonia are delimited - or separated from the originating organism.


A heterocyst finally breaks off from the filament causing fragmentation. These fragments are called hormogonia and undergo asexual reproduction.

A separation disk is a biconcave gelatinous layer found between two adjoining vegetative cells in some blue-green algae and associated with hormogonium formation.


This method of vegetative reproduction is found in blue-green algae. The trichomes of blue-green algae break up within the sheath into many-celled segments called hormogo­nia or hormogones. They remain delim­ited by the formation of heterocysts, separation discs or necridia or by the death and decay of intercalary cells of the trichome.