In this lesson, you have learned that the stomach is an organ in the digestive system that is made up of different tissues that are made of specialized cells. Explain how the stomach depends on other body systems to carry out its role in breaking down food molecules. Use scientific evidence and reasoning to support your answer.

during the process of dna replication, brdu can replace thymidine and incorporate into the newly synthesized dna, cell proliferation thus can be reflected in the extent of brdu incorporation.

light dependent reactions:

light independent reactions:

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i think the answer is a.keratin is the pigment responsible for skin color.