Respuesta :
The branch of biology which deals with the tissue is called histology.
The correct option is A.
The cells of the lungs are hepatocytes and altogether they make the lungs tissue and make it function. The cell of the heart is cardiac cells and altogether they form the cardiac tissue.
The function of both the tissue is different, the lungs tissue helps in breathing while the heart helps pump the blood through out the body.
Hence, the correct option is A that is all cells have the same genes, but different are active in different cells.
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https://brainly.com/question/22810476