Koch’a postulates still influence how doctors practice medicine. Which of these medical procedures is based on Koch’s postulates?

the second type of galaxy is called a barred spiral, which has a thing called a bar straddling the nucleus

if the type of the food available changes, then the frequency of beak types will change, because birds with beaks more suited to the available food will be more successful over time.

i think that is new experiments yield untrustworthy data and should be carefully considered, because you don't know what will happen with the experiments.