UNIT 2 FRQ EXAM REVIEW 2024 QUESTIONS AND ANSWERS

UNIT 2 FRQ EXAM REVIEW 2024 QUESTIONS AND ANSWERS Arctic food web a) refer to the food web above to complete the following table - ANS-i) Identify a primary producer- Diatom (phytoplankton) (ii) Identify a primary consumer- Krill (zooplankton) (iii) Identify a secondary consumer- Cod or seal Arctic food web b) other than showing which organisms are consumed by other organisms, describe what is indicated by the direction of the arrows in the diagram - ANS-Shows the flow of energy among trophic levels Shows the flow of matter through trophic levels Arctic food web c) describe how the change in sea ice habitat is affecting polar bears' ability to hunt and feed - ANS- • Decreasing area of hunting ground (area of ice used for hauling out/fewer seal breathing holes/seals are a less available food source because of more open water) makes it more difficult for polar bears to get food • Increasing area/distance between hunting ground means the polar bears have to exert more energy to swim to find food/physical exhaustion from swimming results in less energy available for hunting • Increasing physiological stress (dehydration, exhaustion, cub mortality, etc.) because polar bears are not physiologically adapted to warmer temperatures • Increasing the time between successful kills results in bears spending more time waiting/hunting for prey Arctic food web Continues...