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Across 1. The replacement of one community by another at a single place over a period of time 4. Where one species win and the other loses 8. A group of various species along with the living and nonliving environment make up this 10. The bodily structure of an organism 11. The relationship between two species in which the parasite benefits from the host which is harmed 13. A triangular diagram that shows an ecosystem's loss of energy 16. The nonliving factors of the environment 18. Group of organisms of the same species that live in a specific geographical area 19. The _________ cycle is the cycling of nitrogen between organisms, soil, water, and the atmosphere

Down 2. Growth in which numbers increase by a certain factor in each successive time period 3. The capacity to do work 5. a proposed explanation that deals with principles or methods, as distinguished from its practice 6. A relationship between two species in which both species benefit 7. The living factors of the environment 9. The variety of organisms in a given area, the genetic variation within a population, the variety of species in a community, or the variety of communities in an ecosystem 12. The process of adapting to an environment 14. the process of change by which new species develop from preexisting species over time or the process where inherited characteristics within a population change over time 15. An English naturalist who studied the diversity of life and proposed a broad explanation for it 17. Main source of energy