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15. Foreign particles circulating in the blood are filtered by the   

13. Which of the following is a barrier against pathogens provided by the skin?

55. Write the balanced equation for photosynthesis.

19. The humoral response depends on B and T helper cells

56. During the light reactions in photosynthesis,__________ is split to replace the lost electrons; splitting reaction forms____________.

11. Natural selection results from interactions between:

25. Explain the difference between micro and macroevolution.

1. Evolution is defined as:

18. Autoanitbodies are probably involved in rheumatoid arthritis(RA)

34. From the Acids and Bases lab: Based on the experiment, what is the best definition of an acid?