A researcher conducted an experiment on a fruit fly species in which a single population of the flies was split into two separate groups. One group was fed with a starch-based food source, and the other group was fed with a maltose-based food source. The populations remained separated with their different food sources for many generations. When the two groups were finally reunited with each other, it was observed that the fruit flies still preferred to mate with members of their original population over members of the other population that had been fed a different food source.

What process is illustrated by this experiment?

A. coevolution

B. convergent evolution

C. gene flow

D. speciation

answer;

a. sheep consumption efficiency would be reduced.

explanation;

-trophic efficiency is a measure of how much energy occurs at one level divided by the energy at the level immediately below it . trophic efficiency incorporates three types of efficiency:

-the proportion of available energy that is consumed (consumption efficiency).   it is the proportion of the available biomass that is ingested by consumers.

-the proportion of ingested food that is assimilated (assimilation efficiency).

-the proportion of assimilated food that goes into new consumer biomass (production efficiency).

-in this case, the grasshoppers would affect sheep by reducing the proportion of the available biomass that is ingested by the sheep.