Two Species of Plants That Are Competitors in Nature Are

Multiple Choice

Two species of plants that are competitors in nature are grown together in the greenhouse.When they are fed additional nitrogen,species A thrives at the expense of species B.When they are fed additional phosphorus,species B thrives at the expense of species A.Increasing the concentration of carbon dioxide has no effect on either species.Both species show improved growth when they are given additional sunlight,but additional moisture has little effect on either one.Based on this information,which resource is most likely to be limiting for both species?

A) Moisture
B) Nitrogen
C) Phosphorus
D) Sunlight
E) Carbon dioxide