12. Given the following organisms: corn, mouse, owl, bacteria, which of the following is well constructed food chain?
A. owl→bacteria→corn→mouse
B. corn←mouse←owl←bacteria
C. bacteria owl mouse corn
D. corn mouse owl bacteria

13. Why do wolves and lions may occupy the same trophic level?
A. they both eat herbivores
B. they lived on land
C. they are large
D. they predators

14. Which of the following relationship exhibits mutualism?
A. algae-fung
B. rats-cats
C. rice bird-hawk
D. worms-humans


16. Which of the following refers to a relationship where one organism benefits and the other is not affected
A. commensalism
B. mutualism
C. predation
D. symbiosis​