Question

Part A. A North American grassland is usually more productive when it contains diverse plant communities. Which statement best explains how biodiversity contributes to the sustainability of this ecosystem?
A
.

Biodiversity increases competition, which limits plant growth and maintains balance.
B.

Biodiversity allows different species to fill various ecological roles, increasing stability after disturbances
C.

Biodiversity decreases the number of interactions among species, making the system more stable.
D.

Biodiversity causes energy to be lost more quickly, reducing ecosystem efficiency

Answer 1

B.

Biodiversity means species can occupy different niches and perform complementary roles (resource use, pollination, nutrient cycling), so the community is more resilient and can recover better after disturbances.