Single-Celled Organisms

Individuals can die--when more individuals die than scizm the species will go extinct.

Ummm, yes. What do you think happens when bacteria is exposed to antibacterial compounds like soap and other cleaners?

Understood. Thank you, tsarstepan.

I think all other living things have a parent(s) and often children. In contrast, I think the single-celled organism keeps on dividing without dying unless is is hit with anti-bacterial spray, etc.

Stromatoporoids in the Lexington Limeston: Sponge...

By the trillions.

maybe even quadrillions