Which graph below best represents the way that density changes over time in a physoclistus fish and in a physostomus fish, respectively?
A)A and B
B)B and A
C)B and C
D)C and B
E)D and B

Question

Quizplus · Accepted Answer

Physoclistus fish have a swim bladder that is closed and not connected to the digestive system, which means they cannot adjust the gas content of their swim bladder, and their density remains constant over time. This is represented by a horizontal line in Graph C. Physostomus fish, on the other hand, have a swim bladder that is open to the digestive system, allowing them to adjust its gas content and therefore their density over time. This is represented by the diagonal line in Graph B. The graph that represents the changes in density over time in each type of fish is therefore Graph D for physoclistus fish and Graph B for physostomus fish.

Which Graph Below Best Represents the Way That Density Changes