How does evaporation effect land-water heating differences?
a. evaporation affects the temperature of land surfaces and water bodies the same amount.
b. evaporation tends to increase temperatures over land.
c. evaporation tends to lower temperatures more over water bodies than over land.
d. evaporation tends to increase the temperature over water.
e. evaporation affects land more than ocean surfaces.

e. Evaporation affects land more than ocean surfaces.

Explanation:

Land warms faster than water. Since the kinetic energy of a molecule is proportional to its temperature, evaporation occurs faster as the temperature is higher. As the molecules that move faster escape, the remaining molecules have a lower average kinetic energy, and therefore the temperature of the liquid decreases.

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 =