What best describes a major weakness of a laboratory-based study? ...

[sam.t96]

What best describes a major weakness of a laboratory-based study?
 A) The costs are too high.
  B) The results cannot be replicated in humans.
  C) The sample sizes are not large enough.
  D) The findings usually cannot be published.

Question 2

Production of active vitamin D requires skin, sunlight, cholesterol, the liver, and the kidneys.
  Indicate whether the statement is true or false

[bbburns21]

Answer to Question 1

B

Answer to Question 2

TRUE

[sam.t96]

Great answer, keep it coming

[atrochim]

Thanks for the timely response, appreciate it