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Across 1. A graph of the mortality data of a population; indicated the probability that individuals witll survive to any given age. (2 Words) 4. A model of population growth that assumes that finite resource levels limit population growth. (2 Words) 6. An enviromental factor that prevents an organism or population from reaching its full potential of distribution or activity. (2 Words) 8. The largest population that an environment can support at any given time. (2 Words) 11. The movement of an individual or group out of an area. 12. The number of births that occur in a period of time in a given area. (2 Words) 13. A group of organisms of the same species that live in a specific geographical area and interbreed. 14. In ecology, the pattern of distribution of organisms in a population. 15. The crossing or mating of plants or animals with close relatives. 16. The number of deaths occurring in a period of time. (2 Words)

Down 2. The number of individuals of the same species that live in a given unit of area. (2 Words) 3. A model of population growth in which a constant and unlimited growth rate results in geometric increases in population size. (2 Words) 5. The movement of an individual or group into an area. 7. The average length of time that an individual is expected to live. (2 Words) 9. The classification of members of a population into groups according to age or the distribution of members of a population in terms of age groups. (2 Words) 10. An expression of the increase in the size of an organism or population over a given period of time (2 Words)