Based on this selection, why do elephants need to migrate out of South Africa? A) to search for food B) to attract a mate C) to avoid poachers D) to find water

The burning of coal, a fossil fuel, produces water and carbon dioxide. How is this similar to cellular respiration? A Both require high temperatures. B Heat energy is lost in both cases. C Both involve the breakdown of carbon compounds.

What level of ecology is concerned with groups of individuals of the same species? A) community B) organism C) ecosystem D) population