Nucleotides. They are the building blocks of DNA.
PH meter, which is a device used to measure hydrogen-ion activity in the solution. A PH meter is a voltmeter stuck to a pH electrode and a reference electrode. -maclittleseed
Answer:
B
Explanation:
I would say this because the pulmonary circulation only transports deoxygenated blood. And this blood gets transported to the lungs so the lungs can absorb oxygen and release carbon dioxide. I am not sure about this one though. This is what I think.
Crop rotation methods in the use of legumes.