Introduction to Environment & Ecology

26. The process through which two or more populations evolve together is called:

a) Competition

b) Symbiosis

c) Mutualism

d) Commensalism

27. The process through which individuals with beneficial traits are more likely to survive and reproduce is called:

a) Natural selection

b) Genetic drift

c) Migration

d) Mutation

28. The transfer of energy from one trophic level to another is not very efficient and is known as the:

a) Trophic cascade

b) Energy pyramid

c) Food chain

d) Biodiversity hotspot

29. The bioaccumulation of toxic substances in organisms at higher trophic levels is called:

a) Biomagnification

b) Biodiversity

c) Pollution

d) Natural selection

30. Which of the following is an example of a keystone species?

a) Lion

b) Elephant

c) Ant

d) Rat