The modification in the shell forms in calcareous (calcium carbonate, CaCO3) foraminifera (protozoan), the
unicellular organisms, reflects their adaptability in accordance with the prevailing physical and chemical
ambience. A comparison of the requirement for secreting mineral matter in the different types of chamber
arrangements in the serial and coiled tests has been attempted based on a new mathematical equation developed for this purpose. Insight into the model for
energy-saving by these organisms in efficiently engineered tests shows the degree of advantages of developing uniserial to complex serial and coiled tests.
Aspects related to the secretion of material, proportional to the energy saved by their adaptive capabilities, have been discussed. The study shows how the
saved energy is utilized to attain larger and stronger
adult tests by foraminifera, which one required under
adverse micro-environments for better survival, which
they adopted through the geological periods.