The cell theory was constructed by robert hook schleiden and schwann carolus linnaeus

Schleiden and Schwann

Explanation:

The cell theory is the now universally believed theory that all living being are formed by cells, and the first cell theory was proposed by Theodor Shchwann and Mathias Jakob Schleiden, back in 1830, the first cell was ever observed in a microscope by Robert Hook in the 16th century but it wouldn´t be untill 2 centuries later that the cell theory started to take form.

the most common energy conversion is from kinetic energy to potential energy, and then from potential energy to kinetic energy.

later on comes the heat energy, mechanical energy, and other energy conversions.

this energy conversion is so common that we can find it in our day to day lives as well.

- one of the most common energy conversions involves the changing of potential energy to kinetic energy or kinetic energy to potential energy