Data: I can control the rate of my follicle replenishment, however I have not had a reason to modify the length of my hair. Why do you ask?
Power conduits are ready. Is something wrong, doctor?
Bashier: Well, you’re breathing.
Data: Yes - I do have a functional respiratory system, however its purpose is to maintain thermal control of my internal systems. I am in fact capable of functioning for extended periods in a vacuum.
Bashier (taking hold of Data’s wrist): And you have a pulse!
Data: My circulatory system not only produces biochemical lubricants, it regulates micro-hydraulic power. Most people are interested in my extraordinary abilities: how fast I can compute, my memory capacity, how long I will live - no one has ever asked me if my hair will grow or noticed that I can breathe.
Bashier: Well your creator went to a lot of trouble to make you seem human. I find that fascinating.