Which statement explains how this type of fossil differs
from a trace fossil?
this fossil reveals the activities of an organism
this fossil was created in solidifying sediment
this fossil is an impression left by an organism.
this fossil was an organism that has been turned into
rock

part 1: which substance has a higher solubility?

a

smallest amount left undissolved atall temps in table shown most has dissolved high sol'by

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 =