The graph illustrates the activity level of three common digestive enzymes, across a range of ph values. calculate the ph range in which pepsin will be effective to some degee?

The graph shows that the activity of pepsin is zero at a pH level between 9-12. This means pepsin does not work properly in basic conditions.  The enzymes start to function slightly between pH 8 to 8.9. Below this pH, the activity of the enzyme, pepsin, gets better and better and it is most effective when the pH of the solution is round about 2. This graph illustrates that pepsin works best in acidic conditions.

the truman doctrine was an american foreign policy whose stated purpose was to counter soviet geopolitical expansion during the cold war. it was announced to congress by president harry s. truman on march 12, 1947, and further developed on july 12, 1948, when he pledged to contain threats to greece and turkey.

you didn't give any options but heres what i can tell you: an inference is likely to change based on additional observations. the latter is something that you have seen or sensed using your sensory organs while the former is like a conclusion out from what you have observed.