The graph below shows the relationship between pH and three different digestive enzymes. Which of the following conclusions can
be drawn from this graph? A. Digestive enzymes are most active in an environment with a pH of 7. B. Enzymes operate most efficiently within a certain range of temperatures. C. Enzymes are only able to operate in acidic environments. D. Each enzyme operates best within a certain pH range.
Many plants and animals would die off <span>if a nearby volcano erupted and filled the sky with dust particles, which caused significantly less sunlight to reach the ecosystem over the course of a year.</span>
