What is true about relative humidity?

a. It indicates how near the air is to saturation.

b. It indicates the actual quantity of water vapor in the air.

c. It is the temperature to which a parcel of air would need to be cooled to reach saturation.

d. It is the general term used to describe the amount of water vapor in the air.

D. It is the general term used to describe the amount of water vapor in the air

Explanation:

It's been a while since I've taken meteorology (2 years), but I think this is the correct answer because humidity in general refers to the amount of water vapor in the air and as we are discussing relative humidity, it cannot indicate the actual quantity of water vapor in the air (thus ruling out B). Therefore, D makes the most sense. I believe C refers to adiabatic cooling.

a scenario where a cell may be needed to perform a form of endocytosis is when transporting large molecules. a scenario where a cell may be needed to perform a form of exocytosis is when releasing the large molecule from the cell.

thats not a question