Adding which to a pond would be least likely to harm the fish and other organisms living
there?

A. Hydrochloric acid

B. buffer

C. drain cleaner

D. ammonia

Select the correct answer. which statement applies only to the axial skeleton, not the appendicular skeleton? a. it contains a pivot joint. b. it has muscles attached that work in pairs. c. it contains red bone marrow. d. it possesses fossa for bone articulation. e. it protects the heart and lungs.