embryonic stem cells could serve as a model to evaluate the physiological effects of environmental pollutants efficiently and cost-effectively.
Answer:
simplifies the study of names of organisms in common language worldwide to all scientists
I believe it is the third one, Acidic carbon dioxide dissolves in water, lowering the water’s pH.
Carbon dioxide is known to make water more acidic because once it dissolves, it forms carbonic acid. Making water more acidic means the pH is being lowered (not raised).
That is my educated guess.