Ecologists use models to illustrate the cycling of matter and flow of energy within an ecosystem. Which of the claims below does this model support? Select all the claims that are supported. A. The number of trophic levels is unlimited. B. The number of trophic levels is limited, and typically is less than 10. C. On average, about 10 percent of available energy is transferred from one trophic level to the next. D. Among consumers in an ecosystem, first-level consumers have the most available energy. E. The maximum amount of energy in a trophic level is 10,000 Joules.

Is there any species that went extinct in recent years due to natural causes (not caused by human interaction). if so, what caused it?

In which way are mercury and venus similar? they both rotate from east to west. they are both small and rocky. they both have thick atmospheres. they both are similar to earth in structure.

1. -define adaptation2 explain darwin's theories of descent with modification and natural selection in detail3. -explain how each of these provides evidence for evolution: a. -fossil record, including superposition and transitional fossilsb-anatomy, including homologous structuresc-biological molecules, including dna and proteins4. -explain the difference between convergent and divergent evolution.5. -define and give three examples of artificial selection6. -define and give one example of coevolution.7. -explain biodiversity and how it benefits humans.8. -explain a type of population lest affected by environmental change.