21. Which volcanic gas was not added to the earth's atmosphere during early differentiation of the planet?
a. CO2
b. O,
c. H2O (vapor)
d. N
e. H2
most reliant per a
la recent completing straten

smooth muscle is composed of involuntary muscles found within the walls of organs and structures such as the esophagus, stomach, intestines, and blood vessels. those muscles push materials like food or blood through organs. unlike skeletal muscle, smooth muscle can never be under your control.

if the temperature drops and becomes cool

then the atmosphere can be freezing as the water vapor in the air is at maximum (100%) and can be severely cold

also can be snowing lightly as the moisture in the air will start to solidify

and btw this is not chemistry but