Which term describes the sum total of the variety of organisms in the biosphere?

Which term describes the sum total of the variety of organisms in the biosphere?

• A. Biodiversity
• B. Invasive species
• C. Biological magnification
• D. Acid rain

Answer: (A)

Biodiversity describes the sum total of the variety of organisms in the biosphere. It includes the number of species, the genetic variation within populations, and the range of ecosystems they form across Earth. This broad sense of life’s variety captures what question is asking about—the overall richness and diversity of life. Invasive species are non-native organisms that can disrupt ecosystems, but they don’t quantify life’s total diversity. Biological magnification is the process by which pollutants become more concentrated as they move up the food chain, not a measure of variety. Acid rain refers to acidic precipitation that can harm organisms, but it isn’t about how many different organisms exist. So, the best term is biodiversity.

Biodiversity describes the sum total of the variety of organisms in the biosphere. It includes the number of species, the genetic variation within populations, and the range of ecosystems they form across Earth. This broad sense of life’s variety captures what question is asking about—the overall richness and diversity of life. Invasive species are non-native organisms that can disrupt ecosystems, but they don’t quantify life’s total diversity. Biological magnification is the process by which pollutants become more concentrated as they move up the food chain, not a measure of variety. Acid rain refers to acidic precipitation that can harm organisms, but it isn’t about how many different organisms exist. So, the best term is biodiversity.