This would be the punnet square:
PT Pt pT pt
pt PpTt Pptt ppTt pptt
pt PpTt Pptt ppTt pptt
I believe the answer is A because this is the two loop system because the air you take in from your lungs automatically is polluted. In the two loop system, the carbon dioxide is taken out out of the oxygen and is pumped back to the heart to be taken out of the body. The oxygenated blood is pumped into places it is needed.
Convection currents, C! The plates move in a cycle called a convection cell that forms when warm material rise, cool, and even sink.
Organic matters are generally carbon compounds. Therefore, the organic molecules contain carbon. The main reason of the presence of carbon in the organic molecules is the catenation property of carbon.
