Question

Question #eba16

Answer 1

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

Explanation:

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.
https://www.merriam-webster.com/dictionary/separation%20disk

Hormogonia:

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.

http://www.biologydiscussion.com/algae/reproduction-in-algae-3-modes/46735