2. The G, and G2 stages got their names because scientists could not observe any activity going on in cells, so they thought there were
in
cellular activity.

the denominator has a very specific role.

he movement of air through earth's or any planet's atmosphere is called wind, and the main cause of earth's winds is uneven heating by the sun. this uneven heating causes changes of atmospheric pressure, and winds blow from regions with high pressure to those with low pressure.

i hope this : )