1. At which pH is pepsin’s activity the highest? 2. Provide a biological explanation for why pepsin’s activity is highest at that pH.

The image shows ekgs of a person with normal heart waves and of a person having tachycardia. based on this image, what kind of condition is tachycardia? a. the heart beats abnormally fast. b. the heart beats abnormally slow. c. the right atrium of the heart stops working. d. the left ventricle pumps less blood to the aorta.

In what for do plants utilize nitrogen? why do they need nitrogen?

What is the correct trna sequence that would match the following mrna sequence.gcgaua