Turtles can either breath through their back end or through their mouth if they choose to.
A.........................................
Answer:
Congestive heart failure occurs when the heart cannot distribute enough blood throughout the body to reach the major organs, causing the tissues to swell with fluid.
Explanation:
If you change two of the three variables than you don’t know if the change is caused by variable A or variable B. In this case if you keep light constant but change the amount of co2 and the color of the light, you can’t which of these two are affecting photosynthesis.
