Sphere calculator*

Input a radius in the field below and you get the volume and surface area of the sphere calculated:

Radius (use at least 1)


Surface area


Volume / surface area


Maths and Biology - Index

Mathematics is related to everything, and above all, to all natural sciences, including biology. Here I will describe, among other things, how the the laws of inheritance , one of the greatest discoveries in biology opening the way to the DNA revolution , was possible because of MendelĀ“s strong background in maths.

Here I will discuss how biology is related to 3 mathematical theories:

Geometry :

The size of cells: surface areas and volumes and the shapes of viruses: polyhedra


MendelĀ“s experiments

Combinatorial analysis

DNA: the four letter code and the independent assortment in meiosis