There are 7 SI base units.
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The SI unit for mass is equivalent to kilograms, which are expressed in terms of the fundamental unit kilogram.
As far as we know there are four: Strong Nuclear, Electromagnetic, Weak Nuclear and Gravitational.
7 which are
The mile is a derived unit, not a fundamental unit. It is derived from the fundamental unit of length in the International System of Units (SI), which is the meter.
Fundamental units are the basic units of measurement in a system of units, typically defined independently of other units. In the International System of Units (SI), the fundamental units include the meter for length, kilogram for mass, second for time, ampere for electric current, kelvin for temperature, mole for amount of substance, and candela for luminous intensity. These units form the basis for deriving all other units of measurement.
You can find the dimensions of derived units in the Wikipedia article on "Planck units".
Cells are the fundamental unit of life.
The ratio of CGS unit to SI unit of energy is 1 CGS unit to 10^7 SI units. This means that 1 erg in CGS units is equivalent to 10^-7 joules in SI units when measuring energy.