The answer would be d.citric acid cycle
B. Digestive and Circulatory
Answer:
AUG start codon methionine
Explanation:
Radioactive atoms are inherently unstable; over time, radioactive "parent atoms" decay into stable "daughter atoms." When molten rock cools, forming what are called igneous rocks, radioactive atoms are trapped inside. ... Scientists date igneous rock using elements that are slow to decay, such as uranium and potassium.