> See also: > - [[Bacteria]] > - [[Environmental Factors Affecting Microbial Growth]] # Non-Eukaryotic Cell Cycles ## Bacterial Cell Cycles The **maximum growth** temperature for an organism can *vary dramatically* depending on *other environmental factors* (pH and nutrients) ![[Pasted image 20231006000646.png|400]] - **Lag Phase:** - Cells are at their healthiest - Smaller cells replicate faster than larger cells - **Log/Exponential Phase:** - Cells are the healthiest - Prokaryotes grow faster than eukaryotes - Smaller cells grow faster than larger cells - **Stationary Phase:** - one cell dies → a new one divides to take its place, but overall population size does not continue to rise (remains constant but metabolically still active) - **Death Phase:** - Two hypotheses: - Programmed [[Programmed Cell Death|cell death]] (PCD) - “fuck it I’m over this whole living thing, but I gotta lotta goods in my belly that I don’t want to go to waste so take em” - Viable but not culturable (VBNC) - **Long-Term Stationary Phase:** - Oscilations across generations as genetic drift occurs to avoid competition and rely on the consumption of different materials ([[Natural Selection]]) - Growth advantage in stationary phase (GASP) phenotype - Can last months to years - Birth and death rates are balanced ## Archaeal Cell Cycle Some archaea are polyploid (many copies of chromosomes) and it is theorized that they do not have an explicit mechanism for partitioning the genetic material the same way bacteria or eukaryotes do