What large-scale feature of the ocean basin is formed when magma comes up out of earth's mantle and hardens to form new oceanic crust?
a. mid-ocean ridge
b. subduction zone
c. hydrothermal vent
d. deep ocean trench

the five characteristics of adolescence are biological growth and development, and undefined status, increased decision making, increased pressure and the search of self.

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 =