Question

in the past, an insecticide known as ddt was widely used in the united states. however, the use of ddt was made illegal in 1972 because it does not easily break down in the environment and it collects in the tissue of animals. the diagram shows the movement of ddt in the tissues of different organisms in the pacific ocean. ddt released from multiple sources into pacific ocean phytoplankton zooplankton herring salmon orcas clear all biomagnification biotic factors biogeography biomass

Explanation:

Biomagnification is the process by which the concentration of a substance, such as DDT, increases in the tissues of organisms as it moves up the food - chain. In the diagram, DDT released into the Pacific Ocean accumulates in phytoplankton, then zooplankton, herring, salmon, and finally orcas, showing an increase in concentration at each trophic level. Biotic factors are living components of an ecosystem. Biogeography is the study of the distribution of species and ecosystems in geographic space. Biomass is the total mass of living organisms in a given area or volume.

Answer:

Biomagnification