Using kilometers in space is useless, as the distances between objects is drastically incred. A lightyear is 9.5 kilometers. It is simpler to say "Alpha Centauri is 4.1 light years away" than it is to say "Alpha Centauri is 28.95 Trillion kilometers away"<span />
Cells know how to differentiate through a process called gene expression. It’s a specific combination of genes that are turned on and off.
Punctuated equilibrium, it is rapid evolution with little change in between
The main difference is that quotas restrict quantity while tariff works through prices
