Of all the atmospheric layers, the troposphere has the
a.
highest temperatures.
b.
lowest temperatures.
c.
highest density.
d.
lowest density.

The correct answer is option C, highest density

Explanation:

The density of air in the atmosphere is the maximum where the largest number of air particles are found and also they are squeezed by the pressure of air above it into a compressed volumetric space.  The maximum squeezing pressure will be at the lowest layer of atmosphere i.e troposphere.

The air density (i.e the number of air molecules per unit volume of atmosphere) is the highest near the earth’s surface/sea surface. Thus, Troposphere being the lowest layer has the maximum air density.  

q: compare the parts of a cell and the cell as a whole to another common nonliving system (i.e., a car, a city,

a:

comparing this to the inside of a food building/company.

all cells are surrounded by a plasma membrane, which protects the cell from its environment, keeping toxic substances out of the cell. it regulates which molecules are allowed to enter and exit the cell.

regulates all cell activity such as cellular metabolism, and growth in addition to storing and maintaining the cell's dna for transcription and replication. determines what proteins to make.

contains the organelles; site of most cell activity

the place where ribosomes do their working activity.

builds the proteins.

prepares proteins for use or export.

responsible for breaking down and absorbing materials taken in by the cell.

maintains cell shape.

transforms one form of energy into another.