C if you look at the square you can see that b b =bb and not Bb
Animals and plants need to get rid of carbon dioxide gas through a process called respiration. Carbon moves from fossil fuels to the atmosphere when fuels are burned. When humans burn fossil fuels to power factories, power plants, cars and trucks, most of the carbon quickly enters the atmosphere as carbon dioxide gas.
The purine base adenine
The pentose sugar ribose
<span>
Three phosphates </span>
