20. What was the initial observation?​

An initial observation is the measurement that you take before you start any process that might cause a change. When you compare your subsequent observations with the initial one, you will see whether any change has taken place, and you will be able to measure the change

in a word, a scientific question is testable. a testable question is one that asks about objects, organisms or events found in the world around it

bradykinin is a physiologically and pharmacologically active peptide of the kinin group of proteins, consisting of nine amino acids.