Que entiende por ciudadanía?

A citizen is a participatory member of a political community. Citizenship is gained by meeting the legal requirements of a national, state, or local government. A nation grants certain rights and privileges to its citizens. Living in a country does not mean that a person is necessarily a citizen of that country.

it is given that trillions of microbes make up to 1% to 3% of the body mass.

let's take average of this percentage: 2%

consider the average mass of the human body as 70 kg.

then, trillions of microbes would have mass  

therefore, 100 trillion micro-organisms would weigh:

this is an approximate value and could change depending on the mass of the human body and percentage of the microbes present in it.

average mass per microorganism =