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starseed53 starseed53
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6 years ago
Gradual thinning and graying of the hair occurs naturally with age. Thinning is caused by , whereas graying is caused by .
 
  a. destruction of the germ centers that produce hair follicles; cessation of pigment production
  b. cessation of pigment production; destruction of the germ centers that produce hair follicles
  c. decrease in epidermal cells; changes in collagen content
  d. changes in collagen content; decrease in epidermal cells
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gracieelaine12gracieelaine12
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starseed53 Author
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6 years ago
You make an excellent tutor!
dri
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Yesterday
Good timing, thanks!
einstein
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2 hours ago
I appreciate what you did here, answered it right Smiling Face with Open Mouth
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