Answer:
SIMPLE DIFFUSION transport
Explanation:
According to this question, John could smell the fragrance of his newly bought bottle of cologne all the way up the hall before he can even get into his bedroom, where he usually keeps it. However, he realizes when he got to his bedroom that he left the bottle of cologne uncovered.
The fragrance of the cologne that spreads from the bedroom all through the hall is as a result of SIMPLE DIFFUSION, a form of PASSIVE TRANSPORT. Diffusion is a form of passive transport in which molecules/fluids move from a region of high concentration to a region of low concentration until it is evenly spread. This is the case with John's cologne, which spread from the bedroom where the concentration is high to the hall, where it is low.
I know that fish and marine animals are affected by this I'm not sure why its difficult to manage tho
Answer : The molar concentration is, 
Explanation :
First we have to calculate the moles of protein.

Number of molecules of protein = 2 molecules
Avogadro's number = 

Now we have to calculate the radius.
Radius = 
Conversion used : (1 mm = 0.001 m)
Now we have to calculate the volume.



Conversion used : (1 m³ = 1000 L)
Now we have to calculate the molar concentration.



Thus, the molar concentration is, 
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hope it helps!</span>