What makes irregular galaxies notable regarding their gas-to-star ratios?

Answer

Many retain large reservoirs of pristine hydrogen gas and often possess higher gas-to-star ratios

Irregular galaxies are often referred to as galactic construction sites because they have not undergone the transformative events that shape elliptical galaxies. They frequently contain immense amounts of pristine hydrogen gas that has not yet been processed into stars. This leads to a high gas-to-star ratio, sometimes surpassing that of even the most active spiral galaxies, reflecting their early stage of development and potential for future growth.

What makes irregular galaxies notable regarding their gas-to-star ratios?
galaxyastronomygasdust