Consider two ecosystems that scientists have labelled as ecosystem A and ecosystem B. The scientists have found that both ecosystems are home to a roughly equal number of species. However, ecosystem A is dominated by a small number of species that are very abundant. Ecosystem B, by contrast, has a more even abundance of organisms across its species.

polar areas, such as antarctica or the south pole.

radiative zone

explanation    

radiative zone is the layer of the sun which energy is transferred away from the core by radiation. although, the core is the only part of the sun that produces an appreciable amount of heat through fusion. in fact, 99% of the energy produced by the sun takes place within 24% of the sun's radius.