This connection makes sense when considering what a nucleus is:
* In biology: The nucleus is the central and most important part of a cell, containing the genetic material (DNA). It's like the "kernel" of the cell, holding the essential information for life.
* In physics: The nucleus is the positively charged central core of an atom, composed of protons and neutrons. It's like the "nut" at the center of the atom, containing the majority of its mass.
Therefore, the term "nucleus" accurately reflects its Latin origin by conveying the idea of a central, essential part of something, just like a nut is the central, essential part of a fruit.