Explain Biodiversity and Population Dynamics Practice Test

Two farms experience the same new fungal disease in mid-season. Farm 1 grows a single genetically uniform wheat variety (monoculture). Farm 2 grows a mix of several wheat varieties plus a strip of legumes and wildflowers along field edges. Which statement best explains how biodiversity affects population stability in this situation?

A community garden depends on pollinators for fruit production. Garden A has five common pollinator species (bees, butterflies, beetles, flies, and hummingbirds). Garden B depends mostly on one bee species. After a pesticide reduces the bee species, which statement best explains the effect of biodiversity on garden stability?