Salmon returning to spawn in their native stream require extreme endurance for the journey. An examination of the muscles used to perform this activity would show that they
A) have substantial reserves of fuel.
B) have low levels of ATPase activity.
C) are well-supplied with blood vessels.
D) have many mitochondria.
E) All of the above

Question

Quizplus · Accepted Answer

Salmon require extreme endurance for their spawning journey, which necessitates substantial fuel reserves (A), low ATPase activity for efficient energy utilization (B), a well-supplied blood vessel network for oxygen delivery (C), and numerous mitochondria for ATP production (D).

Salmon Returning to Spawn in Their Native Stream Require Extreme