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In a nutrient-poor habitat under study, it was observed that pine trees depend on mycorrhizal fungi associated with the root system for nutrient acquisition from the soil. The mycorrhizae in turn depend on the pine trees for energy in the form of carbon. Voles (a kind of rodent) were found to be present in the habitat and their association with the pine trees and mycorrhizae is depicted in the schematic below. Based

Options

  1. AThe three species involved are all in a direct obligate mutualistic relationship with each other.
  2. BIf the young pine trees invading the field fail to acquire mycorrhizal symbionts, the pine tree population cou
  3. CA marked decrease in the vole population would have a negative effect on the growth of new pine trees througho
  4. DThe mycorrhizae share a parasitic relationship with the trees.

Correct answer

C. A marked decrease in the vole population would have a negative effect on the growth of new pine trees througho

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