Science:Math Exam Resources/Courses/MATH102/December 2019/Question 04 (d)/Statement
Remember our fishy friends? The quality of hatching of larvae of cold-water fish depends on the temperature of the water. Each hatch is given a quality ranking from 0 to 10, with 10 being a perfect hatch.
Based on the temperature, we can predict how much energy a fish invests in finding enough food to produce healthy eggs, . Fish also need to spend some energy in being alert for predators that want to eat them, .
The fish try to minimize the total amount of energy used, , by seeking out areas of optimal temperature.
Using the graph above, choose the one statement below that best describes the situation.
- At lower temperatures, there are more predators, so the fish try to seek out waters that are warmer than , but still cold enough to lay eggs in.
- The total amount of energy expended is optimal at around , so the fish seek out waters with this temperature to find the most food to gain energy to lay their eggs.
- The warmer the water, the better for the eggs, because at high temperatures, the total amount of energy does not change much as temperature changes.
- Since there always will be predators around, the fish should focus on foraging to produce eggs, and stay in waters with the optimal temperature .
- The total amount of energy invested is minimal in waters with temperatures of around , although this temperature does not have the most abundant food.
- The energy spent towards being alert is highest at while the energy for producing eggs is lowest around , so fish should thrive best in waters of around .