How are blue and red litmus papers alike

First of all, both of these papers are used to determine the acidity or pH of a certain substance. Blue litmus paper turns red in acidic solution, and retains color in basic solutions. Red litmus paper turns blue in basic solutions and retains color in acidic solutions. Both are derived from inchens. 

C14 dating since carbon is present in both living and no living objects .

The return of the wolf to yellowstone national park will probably affect the bird population to some degree, not significantly. while wolves will hunt birds when necessary, they prefer to hunt larger prey. the bird population will most likely only be affected when hunting is scarce for the wolves. birds of prey will also probably not be affected as much as other birds who spend more time on the ground hunting for food as the tend to spend more time in the air or in trees since they do not need to stay on the ground for long due to the nature of the way they hunt.