Genetic research and testing includes a. the human genome project b. gene therapy c. genetically engineering drugs d. all of the above

Explain why some cells in a females body respond to reproductive hormones while other cells do not.

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Mucous membranes.. a. cover or line external surface of body. b. line internal body surfaces that are in contact with the environment. c. produce antibodies to combat infection. d. secrete sweat, which has antibacterial enzymes.