Alexa has an amazing sangria recipe that calls for red wine, orange juice, and various diced fruits. Her mixture includes 7 parts red wine to 2 parts orange juice. If she uses 21 parts of red wine, how much orange juice should she use? [a] If she uses 9 parts of orange juice, how much red wine should she use?  [b] If she wants to make 12 cups of sangria, how many cups of orange juice need to be used? Write your answer a mixed number (For example, 4 1/2 or 6 2/3). [c]

Urination depends on

Ventilation refers to the process by which

Which one of the following is a human blood type?

Cytotoxic T cells eliminate pathogens by

Which of the following is not required for TH or Tc cell activation?

All of the following are non-specific immunity EXCEPT ________.

DNA restriction enzymes randomly digest a DNA molecule.

All of the following are true of the secondary immune response (IR) except one. Select the one answer that does NOT describe the characteristic of the secondary IR. 

Which of the followings is used as a vehicle to deliver a healthy copy of the gene of interest into the body cells?