Estimates of HANPP range around 20 percent,yet what percent of total heterotrophic biomass do humans make up?

Question

Quizplus · Accepted Answer

Although estimates of HANPP (Human Appropriation of Net Primary Production) may be around 20 percent, humans make up a very small percentage of the total heterotrophic biomass on Earth. According to a study published in the Proceedings of the National Academy of Sciences, humans make up less than 1 percent of the total biomass of all animals on Earth. Therefore, choice D (less than 1 percent) is the best answer.

Estimates of HANPP Range Around 20 Percent,yet What Percent of Total