Which one of the following substances is not excreted by the human body? a. carbon dioxide
b. saliva
c. urea
d. salt ​

Question 4 using myplate's daily food plant for 2000 kilocalories as a reference, the servings from the protein foods group in this menu are a. adequate overall, and consistent with the dietary guidelines 2010 recommendations. b. short 2 ounce equivalents. c. inadequate in terms of the recommendations for a 2000 kcal diet. d. adequate overall, but inconsistent with the dietary guidelines 2010 recommendations.

Which of the following is a testable hypotheses?

Which hormone is used by both males and female?