• Auxospores: These are specialized cells produced by several diatoms. Their primary function is to restore the original cell size of the diatom, which decreases during successive asexual cell divisions.

• Hormocysts: Also known as hormospores, these are thick-walled, multicellular resting spores formed by a few cyanobacteria (such as Westiella lanosa). They act as perennating bodies to help the organism survive unfavorable conditions.

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