Editing Multimodal distribution (section)

===Occurrences in nature===

Examples of variables with bimodal distributions include the time between eruptions of certain [[geyser]]s, the [[Galaxy color-magnitude diagram|color of galaxies]], the size of worker [[weaver ants]], the age of incidence of [[Hodgkin's lymphoma]], the speed of inactivation of the drug [[isoniazid]] in US adults, the absolute magnitude of [[nova]]e, and the [[Circadian rhythm|circadian activity patterns]] of those [[crepuscular]] animals that are active both in morning and evening twilight. In fishery science multimodal length distributions reflect the different year classes and can thus be used for age distribution- and growth estimates of the fish population.<ref>[http://www.fao.org/docrep/W5449E/w5449e05.htm.|FAO: Introduction to tropical fish stock assessment]</ref> Sediments are usually distributed in a bimodal fashion. When sampling mining galleries crossing either the host rock and the mineralized veins, the distribution of geochemical variables would be bimodal. Bimodal distributions are also seen in traffic analysis, where traffic peaks in during the AM rush hour and then again in the PM rush hour. This phenomenon is also seen in daily water distribution, as water demand, in the form of showers, cooking, and toilet use, generally peak in the morning and evening periods. Some genes in bacteria have also exhibited bimodal distributions of gene expression both in normal as well as in stress conditions.<ref name=iscb>{{Cite journal |last=Baptista |first=Ines S. C. |last2=Dash |first2=Suchintak |last3=Arsh |first3=Amir M. |last4=Kandavalli |first4=Vinodh |last5=Scandolo |first5=Carlo Maria |last6=Sanders |first6=Barry C. |last7=Ribeiro |first7=Andre S. |date=2025-02-13 |title=Bimodality in E. coli gene expression: Sources and robustness to genome-wide stresses |url=https://journals.plos.org/ploscompbiol/article?id=10.1371/journal.pcbi.1012817 |journal=PLOS Computational Biology |language=en |volume=21 |issue=2 |pages=e1012817 |doi=10.1371/journal.pcbi.1012817 |issn=1553-7358 |pmc=11825099 |doi-access=free}}</ref>