Scientists say that, by bathing the skin cells in extracts of immune cells, that human skin cells in a test tube are made to behave as if they were immune system cells.


Scientists say that, by bathing the skin cells in extracts of immune cells, that human skin cells in a test tube are made to behave as if they were immune system cells.

A. that human skin cells in a test tube are made to behave as if they were

B. that human skin cells were to behave in a test tube as if they were

C. human skin cells in a test tube were made to behave as if

D. they have made human skin cells in a test tube that were behaving as

E. they have made human skin cells in a test tube behave as if they were


Correct Answer Below (so you don’t see it while reviewing the question)

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Correct Answer: E

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